111512215044 has 18 divisors (see below), whose sum is σ = 281878099230. Its totient is φ = 37170738336.

The previous prime is 111512214973. The next prime is 111512215049. The reversal of 111512215044 is 440512215111.

111512215044 is a `hidden beast` number, since 1 + 1 + 151 + 2 + 2 + 1 + 504 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 110629412100 + 882802944 = 332610^2 + 29712^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 111512214999 and 111512215017.

It is not an unprimeable number, because it can be changed into a prime (111512215049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1548780729 + ... + 1548780800.

Almost surely, 2^111512215044 is an apocalyptic number.

It is an amenable number.

111512215044 is an abundant number, since it is smaller than the sum of its proper divisors (170365884186).

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

111512215044 is a wasteful number, since it uses less digits than its factorization.

111512215044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3097561539 (or 3097561534 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The spelling of 111512215044 in words is "one hundred eleven billion, five hundred twelve million, two hundred fifteen thousand, forty-four".