21323312213232 has 40 divisors (see below), whose sum is σ = 56862165905920. Its totient is φ = 6878487810240.

The previous prime is 21323312213221. The next prime is 21323312213233. The reversal of 21323312213232 is 23231221332312.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21323312213232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323312213233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7165089982 + ... + 7165092957.

It is an arithmetic number, because the mean of its divisors is an integer number (1421554147648).

Almost surely, 2^{21323312213232} is an apocalyptic number.

It is an amenable number.

21323312213232 is an abundant number, since it is smaller than the sum of its proper divisors (35538853692688).

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

21323312213232 is a wasteful number, since it uses less digits than its factorization.

21323312213232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14330182981 (or 14330182975 counting only the distinct ones).

The product of its digits is 15552, while the sum is 30.

Adding to 21323312213232 its reverse (23231221332312), we get a palindrome (44554533545544).

The spelling of 21323312213232 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred twelve million, two hundred thirteen thousand, two hundred thirty-two".