111123998061 has 8 divisors (see below), whose sum is σ = 148167439584. Its totient is φ = 74081610960.

The previous prime is 111123998057. The next prime is 111123998081. The reversal of 111123998061 is 160899321111.

It is a happy number.

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

It is not a de Polignac number, because 111123998061 - 2² = 111123998057 is a prime.

It is a super-2 number, since 2×111123998061² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111123998081) 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, 28566 + ... + 472296.

It is an arithmetic number, because the mean of its divisors is an integer number (18520929948).

Almost surely, 2^111123998061 is an apocalyptic number.

It is an amenable number.

111123998061 is a deficient number, since it is larger than the sum of its proper divisors (37043441523).

111123998061 is an equidigital number, since it uses as much as digits as its factorization.

111123998061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527211.

The product of its (nonzero) digits is 23328, while the sum is 42.

The spelling of 111123998061 in words is "one hundred eleven billion, one hundred twenty-three million, nine hundred ninety-eight thousand, sixty-one".