120000100020 has 48 divisors (see below), whose sum is σ = 336016356480. Its totient is φ = 31998495616.

The previous prime is 120000100009. The next prime is 120000100037. The reversal of 120000100020 is 20001000021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 120000099981 and 120000100008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1817914 + ... + 1882766.

It is an arithmetic number, because the mean of its divisors is an integer number (7000340760).

Almost surely, 2^120000100020 is an apocalyptic number.

120000100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120000100020 is an abundant number, since it is smaller than the sum of its proper divisors (216016256460).

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

120000100020 is a wasteful number, since it uses less digits than its factorization.

120000100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95704 (or 95702 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 120000100020 its reverse (20001000021), we get a palindrome (140001100041).

Subtracting from 120000100020 its reverse (20001000021), we obtain a palindrome (99999099999).

The spelling of 120000100020 in words is "one hundred twenty billion, one hundred thousand, twenty".