100111122220020 has 24 divisors (see below), whose sum is σ = 280311142216224. Its totient is φ = 26696299258656.

The previous prime is 100111122220007. The next prime is 100111122220049. The reversal of 100111122220020 is 20022221111001.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 834259351774 + ... + 834259351893.

It is an arithmetic number, because the mean of its divisors is an integer number (11679630925676).

Almost surely, 2^{100111122220020} is an apocalyptic number.

100111122220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100111122220020 is an abundant number, since it is smaller than the sum of its proper divisors (180200019996204).

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

100111122220020 is a wasteful number, since it uses less digits than its factorization.

100111122220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668518703679 (or 1668518703677 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 100111122220020 its reverse (20022221111001), we get a palindrome (120133343331021).

The spelling of 100111122220020 in words is "one hundred trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty thousand, twenty".