102102010021221 has 48 divisors (see below), whose sum is σ = 169107685655040. Its totient is φ = 54514977471360.

The previous prime is 102102010021171. The next prime is 102102010021229. The reversal of 102102010021221 is 122120010201201.

It is not a de Polignac number, because 102102010021221 - 2¹⁵ = 102102009988453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102102010021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102010021229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 386170126 + ... + 386434431.

It is an arithmetic number, because the mean of its divisors is an integer number (3523076784480).

Almost surely, 2^{102102010021221} is an apocalyptic number.

It is an amenable number.

102102010021221 is a deficient number, since it is larger than the sum of its proper divisors (67005675633819).

102102010021221 is a wasteful number, since it uses less digits than its factorization.

102102010021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772604634 (or 772604627 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102102010021221 its reverse (122120010201201), we get a palindrome (224222020222422).

The spelling of 102102010021221 in words is "one hundred two trillion, one hundred two billion, ten million, twenty-one thousand, two hundred twenty-one".