10311927821 has 4 divisors (see below), whose sum is σ = 11105153052. Its totient is φ = 9518702592.

The previous prime is 10311927811. The next prime is 10311927869. The reversal of 10311927821 is 12872911301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12872911301 = 317 ⋅40608553.

It can be written as a sum of positive squares in 2 ways, for example, as 6953725321 + 3358202500 = 83389^2 + 57950^2 .

It is a cyclic number.

It is not a de Polignac number, because 10311927821 - 2⁶ = 10311927757 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 (10311927811) 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, 396612596 + ... + 396612621.

It is an arithmetic number, because the mean of its divisors is an integer number (2776288263).

Almost surely, 2^10311927821 is an apocalyptic number.

It is an amenable number.

10311927821 is a deficient number, since it is larger than the sum of its proper divisors (793225231).

10311927821 is an equidigital number, since it uses as much as digits as its factorization.

10311927821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793225230.

The product of its (nonzero) digits is 6048, while the sum is 35.

The spelling of 10311927821 in words is "ten billion, three hundred eleven million, nine hundred twenty-seven thousand, eight hundred twenty-one".