111555071020 has 48 divisors (see below), whose sum is σ = 237900595968. Its totient is φ = 43930434240.

The previous prime is 111555070877. The next prime is 111555071027. The reversal of 111555071020 is 20170555111.

It is a self number, because there is not a number n which added to its sum of digits gives 111555071020.

It is not an unprimeable number, because it can be changed into a prime (111555071027) 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 15 ways as a sum of consecutive naturals, for example, 2365875 + ... + 2412565.

It is an arithmetic number, because the mean of its divisors is an integer number (4956262416).

Almost surely, 2^111555071020 is an apocalyptic number.

111555071020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111555071020 is an abundant number, since it is smaller than the sum of its proper divisors (126345524948).

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

111555071020 is a wasteful number, since it uses less digits than its factorization.

111555071020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48550 (or 48548 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 28.

It can be divided in two parts, 1115550 and 71020, that added together give a triangular number (1186570 = T₁₅₄₀).

The spelling of 111555071020 in words is "one hundred eleven billion, five hundred fifty-five million, seventy-one thousand, twenty".