21310023332121 has 16 divisors (see below), whose sum is σ = 28730154539520. Its totient is φ = 14048634915200.

The previous prime is 21310023332119. The next prime is 21310023332161. The reversal of 21310023332121 is 12123332001312.

It is not a de Polignac number, because 21310023332121 - 2¹ = 21310023332119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21310023332091 and 21310023332100.

It is not an unprimeable number, because it can be changed into a prime (21310023332161) 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, 43222185 + ... + 43712438.

It is an arithmetic number, because the mean of its divisors is an integer number (1795634658720).

Almost surely, 2^{21310023332121} is an apocalyptic number.

It is an amenable number.

21310023332121 is a deficient number, since it is larger than the sum of its proper divisors (7420131207399).

21310023332121 is a wasteful number, since it uses less digits than its factorization.

21310023332121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86935536.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21310023332121 its reverse (12123332001312), we get a palindrome (33433355333433).

The spelling of 21310023332121 in words is "twenty-one trillion, three hundred ten billion, twenty-three million, three hundred thirty-two thousand, one hundred twenty-one".