111021212110979 has 2 divisors, whose sum is σ = 111021212110980. Its totient is φ = 111021212110978.

The previous prime is 111021212110951. The next prime is 111021212110981. The reversal of 111021212110979 is 979011212120111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111021212110979 is a prime.

Together with 111021212110981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111021212110909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510606055489 + 55510606055490.

It is an arithmetic number, because the mean of its divisors is an integer number (55510606055490).

Almost surely, 2^{111021212110979} is an apocalyptic number.

111021212110979 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021212110979 is an equidigital number, since it uses as much as digits as its factorization.

111021212110979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 38.

The spelling of 111021212110979 in words is "one hundred eleven trillion, twenty-one billion, two hundred twelve million, one hundred ten thousand, nine hundred seventy-nine".