100021111979 has 2 divisors, whose sum is σ = 100021111980. Its totient is φ = 100021111978.

The previous prime is 100021111951. The next prime is 100021112003. The reversal of 100021111979 is 979111120001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100021111979 - 2²⁴ = 100004334763 is a prime.

It is not a weakly prime, because it can be changed into another prime (100021111919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010555989 + 50010555990.

It is an arithmetic number, because the mean of its divisors is an integer number (50010555990).

Almost surely, 2^100021111979 is an apocalyptic number.

100021111979 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021111979 is an equidigital number, since it uses as much as digits as its factorization.

100021111979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 32.

The spelling of 100021111979 in words is "one hundred billion, twenty-one million, one hundred eleven thousand, nine hundred seventy-nine".