111120990231 has 4 divisors (see below), whose sum is σ = 148161320312. Its totient is φ = 74080660152.

The previous prime is 111120990209. The next prime is 111120990251. The reversal of 111120990231 is 132099021111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 111120990231 - 2⁷ = 111120990103 is a prime.

It is a super-2 number, since 2×111120990231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111120990251) 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, 18520165036 + ... + 18520165041.

It is an arithmetic number, because the mean of its divisors is an integer number (37040330078).

Almost surely, 2^111120990231 is an apocalyptic number.

111120990231 is a deficient number, since it is larger than the sum of its proper divisors (37040330081).

111120990231 is an equidigital number, since it uses as much as digits as its factorization.

111120990231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37040330080.

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

The spelling of 111120990231 in words is "one hundred eleven billion, one hundred twenty million, nine hundred ninety thousand, two hundred thirty-one".