10311921 has 16 divisors (see below), whose sum is σ = 15326400. Its totient is φ = 6852384.

The previous prime is 10311919. The next prime is 10311923. The reversal of 10311921 is 12911301.

It is an interprime number because it is at equal distance from previous prime (10311919) and next prime (10311923).

It is not a de Polignac number, because 10311921 - 2¹ = 10311919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10311894 and 10311903.

It is not an unprimeable number, because it can be changed into a prime (10311923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16350 + ... + 16968.

It is an arithmetic number, because the mean of its divisors is an integer number (957900).

Almost surely, 2^10311921 is an apocalyptic number.

It is an amenable number.

10311921 is a deficient number, since it is larger than the sum of its proper divisors (5014479).

10311921 is an equidigital number, since it uses as much as digits as its factorization.

10311921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 10311921 is about 3211.2179932231. The cubic root of 10311921 is about 217.6606185754.

The spelling of 10311921 in words is "ten million, three hundred eleven thousand, nine hundred twenty-one".