212012101121 has 4 divisors (see below), whose sum is σ = 213681487872. Its totient is φ = 210342714372.

The previous prime is 212012101117. The next prime is 212012101127. The reversal of 212012101121 is 121101210212.

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 not a de Polignac number, because 212012101121 - 2² = 212012101117 is a prime.

It is a super-2 number, since 2×212012101121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212012101096 and 212012101105.

It is not an unprimeable number, because it can be changed into a prime (212012101127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834693185 + ... + 834693438.

It is an arithmetic number, because the mean of its divisors is an integer number (53420371968).

Almost surely, 2^212012101121 is an apocalyptic number.

It is an amenable number.

212012101121 is a deficient number, since it is larger than the sum of its proper divisors (1669386751).

212012101121 is a wasteful number, since it uses less digits than its factorization.

212012101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669386750.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212012101121 its reverse (121101210212), we get a palindrome (333113311333).

The spelling of 212012101121 in words is "two hundred twelve billion, twelve million, one hundred one thousand, one hundred twenty-one".