1021210979 has 2 divisors, whose sum is σ = 1021210980. Its totient is φ = 1021210978.

The previous prime is 1021210921. The next prime is 1021211003. The reversal of 1021210979 is 9790121201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021210979 - 2¹² = 1021206883 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021210919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510605489 + 510605490.

It is an arithmetic number, because the mean of its divisors is an integer number (510605490).

Almost surely, 2^1021210979 is an apocalyptic number.

1021210979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021210979 is an equidigital number, since it uses as much as digits as its factorization.

1021210979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 1021210979 is about 31956.3918332468. The cubic root of 1021210979 is about 1007.0209176868.

The spelling of 1021210979 in words is "one billion, twenty-one million, two hundred ten thousand, nine hundred seventy-nine".