21310032213120 has 128 divisors (see below), whose sum is σ = 77629403111040. Its totient is φ = 4870864502784.

The previous prime is 21310032213103. The next prime is 21310032213157. The reversal of 21310032213120 is 2131223001312.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 792770497 + ... + 792797376.

It is an arithmetic number, because the mean of its divisors is an integer number (606479711805).

Almost surely, 2^{21310032213120} is an apocalyptic number.

21310032213120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21310032213120 is an abundant number, since it is smaller than the sum of its proper divisors (56319370897920).

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

21310032213120 is a wasteful number, since it uses less digits than its factorization.

21310032213120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585567902 (or 1585567890 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21310032213120 its reverse (2131223001312), we get a palindrome (23441255214432).

The spelling of 21310032213120 in words is "twenty-one trillion, three hundred ten billion, thirty-two million, two hundred thirteen thousand, one hundred twenty".