1021313831 has 2 divisors, whose sum is σ = 1021313832. Its totient is φ = 1021313830.

The previous prime is 1021313803. The next prime is 1021313833. The reversal of 1021313831 is 1383131201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021313831 - 2⁶ = 1021313767 is a prime.

It is a super-2 number, since 2×1021313831² = 2086163882783793122, which contains 22 as substring.

Together with 1021313833, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021313797 and 1021313806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021313833) 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 as a sum of consecutive naturals, namely, 510656915 + 510656916.

It is an arithmetic number, because the mean of its divisors is an integer number (510656916).

Almost surely, 2^1021313831 is an apocalyptic number.

1021313831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021313831 is an equidigital number, since it uses as much as digits as its factorization.

1021313831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1021313831 is about 31958.0010482508. The cubic root of 1021313831 is about 1007.0547241645.

The spelling of 1021313831 in words is "one billion, twenty-one million, three hundred thirteen thousand, eight hundred thirty-one".