100001111220120 has 128 divisors (see below), whose sum is σ = 327281116170240. Its totient is φ = 24242341616640.

The previous prime is 100001111220047. The next prime is 100001111220151. The reversal of 100001111220120 is 21022111100001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100001111220096 and 100001111220105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96933252 + ... + 97959468.

It is an arithmetic number, because the mean of its divisors is an integer number (2556883720080).

Almost surely, 2^{100001111220120} is an apocalyptic number.

100001111220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100001111220120 is an abundant number, since it is smaller than the sum of its proper divisors (227280004950120).

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

100001111220120 is a wasteful number, since it uses less digits than its factorization.

100001111220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100065 (or 1100061 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 100001111220120 its reverse (21022111100001), we get a palindrome (121023222320121).

The spelling of 100001111220120 in words is "one hundred trillion, one billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty".