21020031031300 has 72 divisors (see below), whose sum is σ = 54873344200640. Its totient is φ = 6827558947200.

The previous prime is 21020031031297. The next prime is 21020031031339. The reversal of 21020031031300 is 313013002012.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 790213431 + ... + 790240030.

Almost surely, 2^{21020031031300} is an apocalyptic number.

21020031031300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020031031300 is an abundant number, since it is smaller than the sum of its proper divisors (33853313169340).

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

21020031031300 is a wasteful number, since it uses less digits than its factorization.

21020031031300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580453501 (or 1580453494 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21020031031300 its reverse (313013002012), we get a palindrome (21333044033312).

The spelling of 21020031031300 in words is "twenty-one trillion, twenty billion, thirty-one million, thirty-one thousand, three hundred".