111512020455 has 96 divisors (see below), whose sum is σ = 227047691520. Its totient is φ = 50023357440.

The previous prime is 111512020447. The next prime is 111512020513. The reversal of 111512020455 is 554020215111.

It is a happy number.

111512020455 is a `hidden beast` number, since 1 + 1 + 1 + 5 + 1 + 202 + 0 + 455 = 666.

It is not a de Polignac number, because 111512020455 - 2³ = 111512020447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 384184 + ... + 608786.

It is an arithmetic number, because the mean of its divisors is an integer number (2365080120).

Almost surely, 2^111512020455 is an apocalyptic number.

111512020455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111512020455 is an abundant number, since it is smaller than the sum of its proper divisors (115535671065).

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

111512020455 is a wasteful number, since it uses less digits than its factorization.

111512020455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224701 (or 224698 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 111512020455 its reverse (554020215111), we get a palindrome (665532235566).

The spelling of 111512020455 in words is "one hundred eleven billion, five hundred twelve million, twenty thousand, four hundred fifty-five".