21031222023 has 64 divisors (see below), whose sum is σ = 36476190720. Its totient is φ = 11726526816.

The previous prime is 21031222013. The next prime is 21031222061. The reversal of 21031222023 is 32022213012.

It is not a de Polignac number, because 21031222023 - 2⁴ = 21031222007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21031221987 and 21031222005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031222013) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3078990 + ... + 3085812.

It is an arithmetic number, because the mean of its divisors is an integer number (569940480).

Almost surely, 2^21031222023 is an apocalyptic number.

21031222023 is a deficient number, since it is larger than the sum of its proper divisors (15444968697).

21031222023 is a wasteful number, since it uses less digits than its factorization.

21031222023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7233 (or 7227 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21031222023 its reverse (32022213012), we get a palindrome (53053435035).

The spelling of 21031222023 in words is "twenty-one billion, thirty-one million, two hundred twenty-two thousand, twenty-three".