21223122002031 has 16 divisors (see below), whose sum is σ = 28536937406208. Its totient is φ = 14029204800000.

The previous prime is 21223122002029. The next prime is 21223122002051. The reversal of 21223122002031 is 13020022132212.

It is not a de Polignac number, because 21223122002031 - 2¹ = 21223122002029 is a prime.

It is a super-2 number, since 2×21223122002031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21223122001989 and 21223122002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223122002051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21708595 + ... + 22665156.

It is an arithmetic number, because the mean of its divisors is an integer number (1783558587888).

Almost surely, 2^{21223122002031} is an apocalyptic number.

21223122002031 is a deficient number, since it is larger than the sum of its proper divisors (7313815404177).

21223122002031 is a wasteful number, since it uses less digits than its factorization.

21223122002031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44375102.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21223122002031 its reverse (13020022132212), we get a palindrome (34243144134243).

The spelling of 21223122002031 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred twenty-two million, two thousand, thirty-one".