101020111109979 has 16 divisors (see below), whose sum is σ = 134958574587264. Its totient is φ = 67214309803200.

The previous prime is 101020111109963. The next prime is 101020111109987. The reversal of 101020111109979 is 979901111020101.

It is a happy number.

It is not a de Polignac number, because 101020111109979 - 2⁴ = 101020111109963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101020111109979.

It is not an unprimeable number, because it can be changed into a prime (101020111309979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10955689 + ... + 17946234.

It is an arithmetic number, because the mean of its divisors is an integer number (8434910911704).

Almost surely, 2^{101020111109979} is an apocalyptic number.

101020111109979 is a deficient number, since it is larger than the sum of its proper divisors (33938463477285).

101020111109979 is a wasteful number, since it uses less digits than its factorization.

101020111109979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28904218.

The product of its (nonzero) digits is 10206, while the sum is 42.

The spelling of 101020111109979 in words is "one hundred one trillion, twenty billion, one hundred eleven million, one hundred nine thousand, nine hundred seventy-nine".