101111209979 has 32 divisors (see below), whose sum is σ = 113336133120. Its totient is φ = 89622086400.

The previous prime is 101111209957. The next prime is 101111210051. The reversal of 101111209979 is 979902111101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 101111209979 - 2²⁰ = 101110161403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101111209909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5494664 + ... + 5513034.

It is an arithmetic number, because the mean of its divisors is an integer number (3541754160).

Almost surely, 2^101111209979 is an apocalyptic number.

101111209979 is a deficient number, since it is larger than the sum of its proper divisors (12224923141).

101111209979 is a wasteful number, since it uses less digits than its factorization.

101111209979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18611.

The product of its (nonzero) digits is 10206, while the sum is 41.

The spelling of 101111209979 in words is "one hundred one billion, one hundred eleven million, two hundred nine thousand, nine hundred seventy-nine".