21122133210 has 64 divisors (see below), whose sum is σ = 56380959360. Its totient is φ = 5627041920.

The previous prime is 21122133187. The next prime is 21122133211. The reversal of 21122133210 is 1233122112.

It is a super-2 number, since 2×21122133210² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21122133211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241045 + ... + 316775.

It is an arithmetic number, because the mean of its divisors is an integer number (880952490).

Almost surely, 2^21122133210 is an apocalyptic number.

21122133210 is an abundant number, since it is smaller than the sum of its proper divisors (35258826150).

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

21122133210 is a wasteful number, since it uses less digits than its factorization.

21122133210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76780 (or 76774 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21122133210 its reverse (1233122112), we get a palindrome (22355255322).

The spelling of 21122133210 in words is "twenty-one billion, one hundred twenty-two million, one hundred thirty-three thousand, two hundred ten".