111005556100000 has 72 divisors (see below), whose sum is σ = 273160252585836. Its totient is φ = 44402222400000.

The previous prime is 111005556099959. The next prime is 111005556100003. The reversal of 111005556100000 is 1655500111.

It can be written as a sum of positive squares in 6 ways, for example, as 168372350224 + 110837183749776 = 410332^2 + 10527924^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (111005556100003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554927781 + ... + 555127780.

Almost surely, 2^{111005556100000} is an apocalyptic number.

111005556100000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111005556100000 is an abundant number, since it is smaller than the sum of its proper divisors (162154696485836).

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

111005556100000 is an frugal number, since it uses more digits than its factorization.

111005556100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110055596 (or 1110055568 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 111005556100000 in words is "one hundred eleven trillion, five billion, five hundred fifty-six million, one hundred thousand".