12100000020 has 48 divisors (see below), whose sum is σ = 35048280960. Its totient is φ = 3115401856.

The previous prime is 12099999983. The next prime is 12100000051. The reversal of 12100000020 is 2000000121.

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 = 12099999954 and 12100000008.

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, 3475272 + ... + 3478751.

It is an arithmetic number, because the mean of its divisors is an integer number (730172520).

Almost surely, 2^12100000020 is an apocalyptic number.

12100000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12100000020 is an abundant number, since it is smaller than the sum of its proper divisors (22948280940).

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

12100000020 is a wasteful number, since it uses less digits than its factorization.

12100000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6954064 (or 6954062 counting only the distinct ones).

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

Adding to 12100000020 its reverse (2000000121), we get a palindrome (14100000141).

The spelling of 12100000020 in words is "twelve billion, one hundred million, twenty", and thus it is an aban number.