1021130779 has 2 divisors, whose sum is σ = 1021130780. Its totient is φ = 1021130778.

The previous prime is 1021130771. The next prime is 1021130783. The reversal of 1021130779 is 9770311201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021130779 - 2³ = 1021130771 is a prime.

It is a super-2 number, since 2×1021130779² = 2085416135642293682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1021130779.

It is not a weakly prime, because it can be changed into another prime (1021130771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510565389 + 510565390.

It is an arithmetic number, because the mean of its divisors is an integer number (510565390).

Almost surely, 2^1021130779 is an apocalyptic number.

1021130779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021130779 is an equidigital number, since it uses as much as digits as its factorization.

1021130779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 1021130779 is about 31955.1369735759. The cubic root of 1021130779 is about 1006.9945551318.

The spelling of 1021130779 in words is "one billion, twenty-one million, one hundred thirty thousand, seven hundred seventy-nine".