111561651120 has 80 divisors (see below), whose sum is σ = 355188204000. Its totient is φ = 28945723392.

The previous prime is 111561651107. The next prime is 111561651127. The reversal of 111561651120 is 21156165111.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (111561651127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6272745 + ... + 6290504.

It is an arithmetic number, because the mean of its divisors is an integer number (4439852550).

Almost surely, 2^111561651120 is an apocalyptic number.

111561651120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111561651120 is an abundant number, since it is smaller than the sum of its proper divisors (243626552880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111561651120 is a wasteful number, since it uses less digits than its factorization.

111561651120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12563302 (or 12563296 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 30.

The spelling of 111561651120 in words is "one hundred eleven billion, five hundred sixty-one million, six hundred fifty-one thousand, one hundred twenty".