21311553022 has 48 divisors (see below), whose sum is σ = 34682502240. Its totient is φ = 9816049152.

The previous prime is 21311553013. The next prime is 21311553061. The reversal of 21311553022 is 22035511312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23189479 + ... + 23190397.

It is an arithmetic number, because the mean of its divisors is an integer number (722552130).

Almost surely, 2^21311553022 is an apocalyptic number.

21311553022 is a deficient number, since it is larger than the sum of its proper divisors (13370949218).

21311553022 is a wasteful number, since it uses less digits than its factorization.

21311553022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765 (or 1748 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 21311553022 in words is "twenty-one billion, three hundred eleven million, five hundred fifty-three thousand, twenty-two".