21021300113031 has 24 divisors (see below), whose sum is σ = 31575122922960. Its totient is φ = 13822224637248.

The previous prime is 21021300113017. The next prime is 21021300113057. The reversal of 21021300113031 is 13031100312012.

21021300113031 is a `hidden beast` number, since 210 + 21 + 300 + 1 + 130 + 3 + 1 = 666.

It is not a de Polignac number, because 21021300113031 - 2¹⁹ = 21021299588743 is a prime.

It is a super-2 number, since 2×21021300113031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21021300112995 and 21021300113013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021370113031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72906096 + ... + 73193861.

It is an arithmetic number, because the mean of its divisors is an integer number (1315630121790).

Almost surely, 2^{21021300113031} is an apocalyptic number.

21021300113031 is a deficient number, since it is larger than the sum of its proper divisors (10553822809929).

21021300113031 is an equidigital number, since it uses as much as digits as its factorization.

21021300113031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146100112 (or 146100033 counting only the distinct ones).

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

Adding to 21021300113031 its reverse (13031100312012), we get a palindrome (34052400425043).

The spelling of 21021300113031 in words is "twenty-one trillion, twenty-one billion, three hundred million, one hundred thirteen thousand, thirty-one".