1020012009979 has 2 divisors, whose sum is σ = 1020012009980. Its totient is φ = 1020012009978.

The previous prime is 1020012009971. The next prime is 1020012010033. The reversal of 1020012009979 is 9799002100201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020012009979 - 2³ = 1020012009971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020012009971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510006004989 + 510006004990.

It is an arithmetic number, because the mean of its divisors is an integer number (510006004990).

Almost surely, 2^{1020012009979} is an apocalyptic number.

1020012009979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020012009979 is an equidigital number, since it uses as much as digits as its factorization.

1020012009979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 40.

The spelling of 1020012009979 in words is "one trillion, twenty billion, twelve million, nine thousand, nine hundred seventy-nine".