111195971921 has 8 divisors (see below), whose sum is σ = 113567871744. Its totient is φ = 108824323360.

The previous prime is 111195971867. The next prime is 111195971933. The reversal of 111195971921 is 129179591111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111195971921 - 2²⁶ = 111128863057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111195974921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033556 + ... + 1136058.

It is an arithmetic number, because the mean of its divisors is an integer number (14195983968).

Almost surely, 2^111195971921 is an apocalyptic number.

It is an amenable number.

111195971921 is a deficient number, since it is larger than the sum of its proper divisors (2371899823).

111195971921 is a wasteful number, since it uses less digits than its factorization.

111195971921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125631.

The product of its digits is 51030, while the sum is 47.

The spelling of 111195971921 in words is "one hundred eleven billion, one hundred ninety-five million, nine hundred seventy-one thousand, nine hundred twenty-one".