100111111222020 has 24 divisors (see below), whose sum is σ = 280311111421824. Its totient is φ = 26696296325856.

The previous prime is 100111111221971. The next prime is 100111111222043. The reversal of 100111111222020 is 20222111111001.

It is a happy number.

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

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, 834259260124 + ... + 834259260243.

It is an arithmetic number, because the mean of its divisors is an integer number (11679629642576).

Almost surely, 2^{100111111222020} is an apocalyptic number.

100111111222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100111111222020 is an abundant number, since it is smaller than the sum of its proper divisors (180200000199804).

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

100111111222020 is a wasteful number, since it uses less digits than its factorization.

100111111222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668518520379 (or 1668518520377 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 100111111222020 its reverse (20222111111001), we get a palindrome (120333222333021).

The spelling of 100111111222020 in words is "one hundred trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, twenty".