21031222225332 has 48 divisors (see below), whose sum is σ = 53550478118592. Its totient is φ = 6371138369280.

The previous prime is 21031222225331. The next prime is 21031222225333. The reversal of 21031222225332 is 23352222213012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21031222225331) and next prime (21031222225333).

It is a self number, because there is not a number n which added to its sum of digits gives 21031222225332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031222225331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24059913 + ... + 24918704.

It is an arithmetic number, because the mean of its divisors is an integer number (1115634960804).

Almost surely, 2^{21031222225332} is an apocalyptic number.

21031222225332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21031222225332 is an abundant number, since it is smaller than the sum of its proper divisors (32519255893260).

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

21031222225332 is a wasteful number, since it uses less digits than its factorization.

21031222225332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48981888 (or 48981886 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 21031222225332 its reverse (23352222213012), we get a palindrome (44383444438344).

The spelling of 21031222225332 in words is "twenty-one trillion, thirty-one billion, two hundred twenty-two million, two hundred twenty-five thousand, three hundred thirty-two".