102012111201221 has 16 divisors (see below), whose sum is σ = 111760654998720. Its totient is φ = 92536331109120.

The previous prime is 102012111201197. The next prime is 102012111201359. The reversal of 102012111201221 is 122102111210201.

It is a de Polignac number, because none of the positive numbers 2^k-102012111201221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102012111201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012111291221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21300695 + ... + 25646516.

It is an arithmetic number, because the mean of its divisors is an integer number (6985040937420).

Almost surely, 2^{102012111201221} is an apocalyptic number.

It is an amenable number.

102012111201221 is a deficient number, since it is larger than the sum of its proper divisors (9748543797499).

102012111201221 is a wasteful number, since it uses less digits than its factorization.

102012111201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46950116.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 102012111201221 its reverse (122102111210201), we get a palindrome (224114222411422).

The spelling of 102012111201221 in words is "one hundred two trillion, twelve billion, one hundred eleven million, two hundred one thousand, two hundred twenty-one".