111201120100 has 72 divisors (see below), whose sum is σ = 278622028160. Its totient is φ = 37733022720.

The previous prime is 111201120091. The next prime is 111201120139. The reversal of 111201120100 is 1021102111.

It is a super-2 number, since 2×111201120100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 750960 + ... + 886759.

Almost surely, 2^111201120100 is an apocalyptic number.

111201120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201120100 is an abundant number, since it is smaller than the sum of its proper divisors (167420908060).

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

111201120100 is a wasteful number, since it uses less digits than its factorization.

111201120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637837 (or 1637830 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111201120100 its reverse (1021102111), we get a palindrome (112222222211).

The spelling of 111201120100 in words is "one hundred eleven billion, two hundred one million, one hundred twenty thousand, one hundred".