12100020020 has 24 divisors (see below), whose sum is σ = 27720046368. Its totient is φ = 4400007200.

The previous prime is 12100019947. The next prime is 12100020029. The reversal of 12100020020 is 2002000121.

12100020020 is a modest number, since divided by 20020 gives 12100 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100020029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27499826 + ... + 27500265.

It is an arithmetic number, because the mean of its divisors is an integer number (1155001932).

Almost surely, 2^12100020020 is an apocalyptic number.

12100020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12100020020 is an abundant number, since it is smaller than the sum of its proper divisors (15620026348).

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

12100020020 is a wasteful number, since it uses less digits than its factorization.

12100020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55000111 (or 55000109 counting only the distinct ones).

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

Adding to 12100020020 its reverse (2002000121), we get a palindrome (14102020141).

The spelling of 12100020020 in words is "twelve billion, one hundred million, twenty thousand, twenty".