21022311000 has 64 divisors (see below), whose sum is σ = 65589619680. Its totient is φ = 5605948800.

The previous prime is 21022310987. The next prime is 21022311007. The reversal of 21022311000 is 11322012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022311007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3500719 + ... + 3506718.

Almost surely, 2^21022311000 is an apocalyptic number.

21022311000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022311000 is an abundant number, since it is smaller than the sum of its proper divisors (44567308680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022311000 is a wasteful number, since it uses less digits than its factorization.

21022311000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7007461 (or 7007447 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21022311000 its reverse (11322012), we get a palindrome (21033633012).

The spelling of 21022311000 in words is "twenty-one billion, twenty-two million, three hundred eleven thousand".