10319317021 has 4 divisors (see below), whose sum is σ = 11113110652. Its totient is φ = 9525523392.

The previous prime is 10319317009. The next prime is 10319317079. The reversal of 10319317021 is 12071391301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 664092900 + 9655224121 = 25770^2 + 98261^2 .

It is a cyclic number.

It is not a de Polignac number, because 10319317021 - 2⁹ = 10319316509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10319317081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396896796 + ... + 396896821.

It is an arithmetic number, because the mean of its divisors is an integer number (2778277663).

Almost surely, 2^10319317021 is an apocalyptic number.

It is an amenable number.

10319317021 is a deficient number, since it is larger than the sum of its proper divisors (793793631).

10319317021 is an equidigital number, since it uses as much as digits as its factorization.

10319317021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793793630.

The product of its (nonzero) digits is 1134, while the sum is 28.

The spelling of 10319317021 in words is "ten billion, three hundred nineteen million, three hundred seventeen thousand, twenty-one".