102021000111121 has 32 divisors (see below), whose sum is σ = 128676165408000. Its totient is φ = 78720941905920.

The previous prime is 102021000111109. The next prime is 102021000111127. The reversal of 102021000111121 is 121111000120201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102021000111121 - 2²¹ = 102020998013969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (102021000111127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4493830 + ... + 14974528.

It is an arithmetic number, because the mean of its divisors is an integer number (4021130169000).

Almost surely, 2^{102021000111121} is an apocalyptic number.

It is an amenable number.

102021000111121 is a deficient number, since it is larger than the sum of its proper divisors (26655165296879).

102021000111121 is a wasteful number, since it uses less digits than its factorization.

102021000111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10483369.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 102021000111121 its reverse (121111000120201), we get a palindrome (223132000231322).

The spelling of 102021000111121 in words is "one hundred two trillion, twenty-one billion, one hundred eleven thousand, one hundred twenty-one".