1212021211979 has 2 divisors, whose sum is σ = 1212021211980. Its totient is φ = 1212021211978.

The previous prime is 1212021211963. The next prime is 1212021212027. The reversal of 1212021211979 is 9791121202121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212021211979 - 2⁴ = 1212021211963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212021211939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606010605989 + 606010605990.

It is an arithmetic number, because the mean of its divisors is an integer number (606010605990).

Almost surely, 2^{1212021211979} is an apocalyptic number.

1212021211979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212021211979 is an equidigital number, since it uses as much as digits as its factorization.

1212021211979 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 38.

The spelling of 1212021211979 in words is "one trillion, two hundred twelve billion, twenty-one million, two hundred eleven thousand, nine hundred seventy-nine".