111221123130 has 48 divisors (see below), whose sum is σ = 311419148040. Its totient is φ = 27377506944.

The previous prime is 111221123081. The next prime is 111221123141. The reversal of 111221123130 is 31321122111.

It can be written as a sum of positive squares in 4 ways, for example, as 52903220049 + 58317903081 = 230007^2 + 241491^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 47529225 + ... + 47531564.

Almost surely, 2^111221123130 is an apocalyptic number.

111221123130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111221123130 is an abundant number, since it is smaller than the sum of its proper divisors (200198024910).

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

111221123130 is a wasteful number, since it uses less digits than its factorization.

111221123130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95060815 (or 95060812 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111221123130 its reverse (31321122111), we get a palindrome (142542245241).

The spelling of 111221123130 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred twenty-three thousand, one hundred thirty".