21310032125 has 16 divisors (see below), whose sum is σ = 26915353920. Its totient is φ = 16842619600.

The previous prime is 21310032113. The next prime is 21310032137. The reversal of 21310032125 is 52123001312.

It is an interprime number because it is at equal distance from previous prime (21310032113) and next prime (21310032137).

It is not a de Polignac number, because 21310032125 - 2⁴ = 21310032109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21310032097 and 21310032106.

It is a congruent number.

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, 1016615 + ... + 1037364.

It is an arithmetic number, because the mean of its divisors is an integer number (1682209620).

Almost surely, 2^21310032125 is an apocalyptic number.

21310032125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21310032125 is a deficient number, since it is larger than the sum of its proper divisors (5605321795).

21310032125 is an equidigital number, since it uses as much as digits as its factorization.

21310032125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054077 (or 2054067 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 21310032125 its reverse (52123001312), we get a palindrome (73433033437).

The spelling of 21310032125 in words is "twenty-one billion, three hundred ten million, thirty-two thousand, one hundred twenty-five".