21323132232210 has 64 divisors (see below), whose sum is σ = 56961619027200. Its totient is φ = 5676175287936.

The previous prime is 21323132232197. The next prime is 21323132232301. The reversal of 21323132232210 is 1223223132312.

21323132232210 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 3 + 1 + 322 + 322 + 10 = 666.

It is a super-2 number, since 2×21323132232210² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69244054 + ... + 69551313.

It is an arithmetic number, because the mean of its divisors is an integer number (890025297300).

Almost surely, 2^{21323132232210} is an apocalyptic number.

21323132232210 is an abundant number, since it is smaller than the sum of its proper divisors (35638486794990).

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

21323132232210 is a wasteful number, since it uses less digits than its factorization.

21323132232210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138795952 (or 138795946 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21323132232210 its reverse (1223223132312), we get a palindrome (22546355364522).

The spelling of 21323132232210 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred thirty-two million, two hundred thirty-two thousand, two hundred ten".