21322413212 has 48 divisors (see below), whose sum is σ = 40347417600. Its totient is φ = 9829364160.

The previous prime is 21322413181. The next prime is 21322413223. The reversal of 21322413212 is 21231422312.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1645037 + ... + 1657947.

It is an arithmetic number, because the mean of its divisors is an integer number (840571200).

Almost surely, 2^21322413212 is an apocalyptic number.

It is an amenable number.

21322413212 is a deficient number, since it is larger than the sum of its proper divisors (19025004388).

21322413212 is a wasteful number, since it uses less digits than its factorization.

21322413212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13586 (or 13584 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

Adding to 21322413212 its reverse (21231422312), we get a palindrome (42553835524).

The spelling of 21322413212 in words is "twenty-one billion, three hundred twenty-two million, four hundred thirteen thousand, two hundred twelve".