1021113239 has 2 divisors, whose sum is σ = 1021113240. Its totient is φ = 1021113238.

The previous prime is 1021113193. The next prime is 1021113253. The reversal of 1021113239 is 9323111201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021113239 is a prime.

It is a super-2 number, since 2×1021113239² = 2085344493722142242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021113439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510556619 + 510556620.

It is an arithmetic number, because the mean of its divisors is an integer number (510556620).

Almost surely, 2^1021113239 is an apocalyptic number.

1021113239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021113239 is an equidigital number, since it uses as much as digits as its factorization.

1021113239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1021113239 is about 31954.8625251307. The cubic root of 1021113239 is about 1006.9887893716.

The spelling of 1021113239 in words is "one billion, twenty-one million, one hundred thirteen thousand, two hundred thirty-nine".