21003211312320 has 56 divisors (see below), whose sum is σ = 66685195919664. Its totient is φ = 5600856349696.

The previous prime is 21003211312313. The next prime is 21003211312331. The reversal of 21003211312320 is 2321311230012.

It is a super-2 number, since 2×21003211312320² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10939171599 + ... + 10939173518.

It is an arithmetic number, because the mean of its divisors is an integer number (1190807069994).

Almost surely, 2^{21003211312320} is an apocalyptic number.

21003211312320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003211312320 is an abundant number, since it is smaller than the sum of its proper divisors (45681984607344).

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

21003211312320 is a wasteful number, since it uses less digits than its factorization.

21003211312320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21878345137 (or 21878345127 counting only the distinct ones).

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

Adding to 21003211312320 its reverse (2321311230012), we get a palindrome (23324522542332).

The spelling of 21003211312320 in words is "twenty-one trillion, three billion, two hundred eleven million, three hundred twelve thousand, three hundred twenty".