21311022132 has 48 divisors (see below), whose sum is σ = 55382779200. Its totient is φ = 7086705120.

The previous prime is 21311022091. The next prime is 21311022151. The reversal of 21311022132 is 23122011312.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190219 + ... + 280722.

It is an arithmetic number, because the mean of its divisors is an integer number (1153807900).

Almost surely, 2^21311022132 is an apocalyptic number.

It is an amenable number.

21311022132 is an abundant number, since it is smaller than the sum of its proper divisors (34071757068).

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

21311022132 is a wasteful number, since it uses less digits than its factorization.

21311022132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471373 (or 471365 counting only the distinct ones).

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

Adding to 21311022132 its reverse (23122011312), we get a palindrome (44433033444).

The spelling of 21311022132 in words is "twenty-one billion, three hundred eleven million, twenty-two thousand, one hundred thirty-two".