21230203332121 has 16 divisors (see below), whose sum is σ = 24283772360064. Its totient is φ = 18181807098624.

The previous prime is 21230203332113. The next prime is 21230203332127. The reversal of 21230203332121 is 12123330203212.

It is a cyclic number.

It is not a de Polignac number, because 21230203332121 - 2³ = 21230203332113 is a prime.

It is a super-2 number, since 2×21230203332121² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21230203332127) 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, 134753025 + ... + 134910481.

It is an arithmetic number, because the mean of its divisors is an integer number (1517735772504).

Almost surely, 2^{21230203332121} is an apocalyptic number.

It is an amenable number.

21230203332121 is a deficient number, since it is larger than the sum of its proper divisors (3053569027943).

21230203332121 is a wasteful number, since it uses less digits than its factorization.

21230203332121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173760.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21230203332121 its reverse (12123330203212), we get a palindrome (33353533535333).

The spelling of 21230203332121 in words is "twenty-one trillion, two hundred thirty billion, two hundred three million, three hundred thirty-two thousand, one hundred twenty-one".