21120211152320 has 112 divisors (see below), whose sum is σ = 57479729592000. Its totient is φ = 7240889769984.

The previous prime is 21120211152253. The next prime is 21120211152349. The reversal of 21120211152320 is 2325111202112.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52567556 + ... + 52967804.

Almost surely, 2^{21120211152320} is an apocalyptic number.

21120211152320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120211152320 is an abundant number, since it is smaller than the sum of its proper divisors (36359518439680).

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

21120211152320 is a wasteful number, since it uses less digits than its factorization.

21120211152320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423830 (or 423820 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 21120211152320 its reverse (2325111202112), we get a palindrome (23445322354432).

The spelling of 21120211152320 in words is "twenty-one trillion, one hundred twenty billion, two hundred eleven million, one hundred fifty-two thousand, three hundred twenty".