1021212021979 has 2 divisors, whose sum is σ = 1021212021980. Its totient is φ = 1021212021978.

The previous prime is 1021212021923. The next prime is 1021212022007. The reversal of 1021212021979 is 9791202121201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021212021979 - 2³³ = 1012622087387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021312021979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510606010989 + 510606010990.

It is an arithmetic number, because the mean of its divisors is an integer number (510606010990).

Almost surely, 2^{1021212021979} is an apocalyptic number.

1021212021979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021212021979 is an equidigital number, since it uses as much as digits as its factorization.

1021212021979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

The spelling of 1021212021979 in words is "one trillion, twenty-one billion, two hundred twelve million, twenty-one thousand, nine hundred seventy-nine".