111056421520 has 80 divisors (see below), whose sum is σ = 281920616640. Its totient is φ = 40349580800.

The previous prime is 111056421493. The next prime is 111056421563. The reversal of 111056421520 is 25124650111.

111056421520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×111056421520² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985851 + ... + 1092709.

It is an arithmetic number, because the mean of its divisors is an integer number (3524007708).

Almost surely, 2^111056421520 is an apocalyptic number.

111056421520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111056421520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140960308320).

111056421520 is an abundant number, since it is smaller than the sum of its proper divisors (170864195120).

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

111056421520 is a wasteful number, since it uses less digits than its factorization.

111056421520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108064 (or 108058 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The spelling of 111056421520 in words is "one hundred eleven billion, fifty-six million, four hundred twenty-one thousand, five hundred twenty".