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212121112101121 = 316842616519391
BaseRepresentation
bin110000001110110001001011…
…100010010100000100000001
31000211001120200000111100210201
4300032301023202110010001
5210300343014144213441
62031051032120125201
762452146621235666
oct6016611342240401
91024046600440721
10212121112101121
1161652070882303
121b95a5ab306801
139148c20392812
143a54a06517a6d
15197cb548dbc31
hexc0ec4b894101

212121112101121 has 4 divisors (see below), whose sum is σ = 218963728620544. Its totient is φ = 205278495581700.

The previous prime is 212121112101109. The next prime is 212121112101127. The reversal of 212121112101121 is 121101211121212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-212121112101121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212121112101127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3421308259665 + ... + 3421308259726.

It is an arithmetic number, because the mean of its divisors is an integer number (54740932155136).

Almost surely, 2212121112101121 is an apocalyptic number.

It is an amenable number.

212121112101121 is a deficient number, since it is larger than the sum of its proper divisors (6842616519423).

212121112101121 is an equidigital number, since it uses as much as digits as its factorization.

212121112101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6842616519422.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 212121112101121 its reverse (121101211121212), we get a palindrome (333222323222333).

The spelling of 212121112101121 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred twelve million, one hundred one thousand, one hundred twenty-one".

Divisors: 1 31 6842616519391 212121112101121