12002100020 has 24 divisors (see below), whose sum is σ = 25336378368. Its totient is φ = 4775703200.

The previous prime is 12002099999. The next prime is 12002100031. The reversal of 12002100020 is 2000120021.

It is a junction number, because it is equal to n+sod(n) for n = 12002099980 and 12002100007.

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, 1567136 + ... + 1574775.

It is an arithmetic number, because the mean of its divisors is an integer number (1055682432).

Almost surely, 2^12002100020 is an apocalyptic number.

12002100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12002100020 is an abundant number, since it is smaller than the sum of its proper divisors (13334278348).

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

12002100020 is a wasteful number, since it uses less digits than its factorization.

12002100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142111 (or 3142109 counting only the distinct ones).

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

Adding to 12002100020 its reverse (2000120021), we get a palindrome (14002220041).

The spelling of 12002100020 in words is "twelve billion, two million, one hundred thousand, twenty".