111231120100 has 18 divisors (see below), whose sum is σ = 241371530834. Its totient is φ = 44492448000.

The previous prime is 111231120097. The next prime is 111231120131. The reversal of 111231120100 is 1021132111.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 8559580324 + 102671539776 = 92518^2 + 320424^2 .

It is an unprimeable number.

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, 556155501 + ... + 556155700.

Almost surely, 2^111231120100 is an apocalyptic number.

111231120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111231120100 is an abundant number, since it is smaller than the sum of its proper divisors (130140410734).

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

111231120100 is a wasteful number, since it uses less digits than its factorization.

111231120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112311215 (or 1112311208 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 111231120100 its reverse (1021132111), we get a palindrome (112252252211).

The spelling of 111231120100 in words is "one hundred eleven billion, two hundred thirty-one million, one hundred twenty thousand, one hundred".