111920961 has 4 divisors (see below), whose sum is σ = 149227952. Its totient is φ = 74613972.

The previous prime is 111920953. The next prime is 111920969. The reversal of 111920961 is 169029111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (111920953) and next prime (111920969).

It is not a de Polignac number, because 111920961 - 2³ = 111920953 is a prime.

It is a super-2 number, since 2×111920961² = 25052603022327042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111920969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18653491 + ... + 18653496.

It is an arithmetic number, because the mean of its divisors is an integer number (37306988).

Almost surely, 2^111920961 is an apocalyptic number.

It is an amenable number.

111920961 is a deficient number, since it is larger than the sum of its proper divisors (37306991).

111920961 is an equidigital number, since it uses as much as digits as its factorization.

111920961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37306990.

The product of its (nonzero) digits is 972, while the sum is 30.

The square root of 111920961 is about 10579.2703434594. The cubic root of 111920961 is about 481.9150361308.

The spelling of 111920961 in words is "one hundred eleven million, nine hundred twenty thousand, nine hundred sixty-one".