21021300013131 has 64 divisors (see below), whose sum is σ = 34401006743040. Its totient is φ = 12580145665920.

The previous prime is 21021300013121. The next prime is 21021300013169. The reversal of 21021300013131 is 13131000312012.

21021300013131 is a `hidden beast` number, since 210 + 21 + 300 + 0 + 1 + 3 + 131 = 666.

It is not a de Polignac number, because 21021300013131 - 2¹⁰ = 21021300012107 is a prime.

It is a super-2 number, since 2×21021300013131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21021300013121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47429805 + ... + 47870961.

It is an arithmetic number, because the mean of its divisors is an integer number (537515730360).

Almost surely, 2^{21021300013131} is an apocalyptic number.

21021300013131 is a deficient number, since it is larger than the sum of its proper divisors (13379706729909).

21021300013131 is a wasteful number, since it uses less digits than its factorization.

21021300013131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443193 (or 443187 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21021300013131 its reverse (13131000312012), we get a palindrome (34152300325143).

The spelling of 21021300013131 in words is "twenty-one trillion, twenty-one billion, three hundred million, thirteen thousand, one hundred thirty-one".