100111212220 has 24 divisors (see below), whose sum is σ = 211395064608. Its totient is φ = 39823243200.

The previous prime is 100111212151. The next prime is 100111212337. The reversal of 100111212220 is 22212111001.

It is a self number, because there is not a number n which added to its sum of digits gives 100111212220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13823896 + ... + 13831135.

It is an arithmetic number, because the mean of its divisors is an integer number (8808127692).

Almost surely, 2^100111212220 is an apocalyptic number.

100111212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100111212220 is an abundant number, since it is smaller than the sum of its proper divisors (111283852388).

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

100111212220 is a wasteful number, since it uses less digits than its factorization.

100111212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27655221 (or 27655219 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100111212220 its reverse (22212111001), we get a palindrome (122323323221).

The spelling of 100111212220 in words is "one hundred billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty".