102021120210021 has 16 divisors (see below), whose sum is σ = 136770169536000. Its totient is φ = 67643367766128.

The previous prime is 102021120210007. The next prime is 102021120210059. The reversal of 102021120210021 is 120012021120201.

It is not a de Polignac number, because 102021120210021 - 2⁹ = 102021120209509 is a prime.

It is a super-2 number, since 2×102021120210021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021120210071) 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, 35134111 + ... + 37926876.

It is an arithmetic number, because the mean of its divisors is an integer number (8548135596000).

Almost surely, 2^{102021120210021} is an apocalyptic number.

It is an amenable number.

102021120210021 is a deficient number, since it is larger than the sum of its proper divisors (34749049325979).

102021120210021 is a wasteful number, since it uses less digits than its factorization.

102021120210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73063528.

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

Adding to 102021120210021 its reverse (120012021120201), we get a palindrome (222033141330222).

The spelling of 102021120210021 in words is "one hundred two trillion, twenty-one billion, one hundred twenty million, two hundred ten thousand, twenty-one".