10312400021 has 16 divisors (see below), whose sum is σ = 12859240320. Its totient is φ = 8034247680.

The previous prime is 10312400017. The next prime is 10312400023. The reversal of 10312400021 is 12000421301.

It is a cyclic number.

It is not a de Polignac number, because 10312400021 - 2² = 10312400017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10312399969 and 10312400005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10312400023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 878825 + ... + 890481.

It is an arithmetic number, because the mean of its divisors is an integer number (803702520).

Almost surely, 2^10312400021 is an apocalyptic number.

10312400021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10312400021 is a deficient number, since it is larger than the sum of its proper divisors (2546840299).

10312400021 is a wasteful number, since it uses less digits than its factorization.

10312400021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23164.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 10312400021 its reverse (12000421301), we get a palindrome (22312821322).

The spelling of 10312400021 in words is "ten billion, three hundred twelve million, four hundred thousand, twenty-one".