21321122032320 has 224 divisors, whose sum is σ = 78192650336256. Its totient is φ = 4864712294400.

The previous prime is 21321122032307. The next prime is 21321122032333. The reversal of 21321122032320 is 2323022112312.

It is an interprime number because it is at equal distance from previous prime (21321122032307) and next prime (21321122032333).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 59204176 + ... + 59563215.

Almost surely, 2^{21321122032320} is an apocalyptic number.

21321122032320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21321122032320 is an abundant number, since it is smaller than the sum of its proper divisors (56871528303936).

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

21321122032320 is a wasteful number, since it uses less digits than its factorization.

21321122032320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118767439 (or 118767429 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21321122032320 its reverse (2323022112312), we get a palindrome (23644144144632).

The spelling of 21321122032320 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred twenty-two million, thirty-two thousand, three hundred twenty".