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1212200200221 = 31314493073943
BaseRepresentation
bin10001101000111100110…
…000110010100000011101
311021212220022112111101220
4101220330300302200131
5124330041222401341
62324513241123553
7153402310456623
oct21507460624035
94255808474356
101212200200221
1142810045809a
12176b234895b9
138a4050769aa
144295697b513
15217ead04a66
hex11a3cc3281d

1212200200221 has 8 divisors (see below), whose sum is σ = 1616279755200. Its totient is φ = 808127056032.

The previous prime is 1212200200217. The next prime is 1212200200231. The reversal of 1212200200221 is 1220020022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212200200221 - 22 = 1212200200217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212200200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212200200231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1142625 + ... + 1931318.

It is an arithmetic number, because the mean of its divisors is an integer number (202034969400).

Almost surely, 21212200200221 is an apocalyptic number.

It is an amenable number.

1212200200221 is a deficient number, since it is larger than the sum of its proper divisors (404079554979).

1212200200221 is a wasteful number, since it uses less digits than its factorization.

1212200200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205395.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1212200200221 its reverse (1220020022121), we get a palindrome (2432220222342).

The spelling of 1212200200221 in words is "one trillion, two hundred twelve billion, two hundred million, two hundred thousand, two hundred twenty-one".

Divisors: 1 3 131449 394347 3073943 9221829 404066733407 1212200200221