102221211022021 has 64 divisors (see below), whose sum is σ = 127900425945600. Its totient is φ = 79543962869760.

The previous prime is 102221211022001. The next prime is 102221211022027. The reversal of 102221211022021 is 120220112122201.

It is a cyclic number.

It is not a de Polignac number, because 102221211022021 - 2¹¹ = 102221211019973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102221211022021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221211022027) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6139772505 + ... + 6139789153.

It is an arithmetic number, because the mean of its divisors is an integer number (1998444155400).

Almost surely, 2^{102221211022021} is an apocalyptic number.

It is an amenable number.

102221211022021 is a deficient number, since it is larger than the sum of its proper divisors (25679214923579).

102221211022021 is a wasteful number, since it uses less digits than its factorization.

102221211022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20366.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102221211022021 its reverse (120220112122201), we get a palindrome (222441323144222).

The spelling of 102221211022021 in words is "one hundred two trillion, two hundred twenty-one billion, two hundred eleven million, twenty-two thousand, twenty-one".