111021220100 has 72 divisors (see below), whose sum is σ = 278817987840. Its totient is φ = 37582571520.

The previous prime is 111021220067. The next prime is 111021220139. The reversal of 111021220100 is 1022120111.

It is a super-2 number, since 2×111021220100² (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 23 ways as a sum of consecutive naturals, for example, 948509 + ... + 1059108.

Almost surely, 2^111021220100 is an apocalyptic number.

111021220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021220100 is an abundant number, since it is smaller than the sum of its proper divisors (167796767740).

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

111021220100 is a wasteful number, since it uses less digits than its factorization.

111021220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007717 (or 2007710 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111021220100 its reverse (1022120111), we get a palindrome (112043340211).

The spelling of 111021220100 in words is "one hundred eleven billion, twenty-one million, two hundred twenty thousand, one hundred".