12100212100 has 18 divisors (see below), whose sum is σ = 26257460474. Its totient is φ = 4840084800.

The previous prime is 12100212079. The next prime is 12100212101. The reversal of 12100212100 is 121200121.

It can be written as a sum of positive squares in 3 ways, for example, as 2640315456 + 9459896644 = 51384^2 + 97262^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (12100212101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60500961 + ... + 60501160.

Almost surely, 2^12100212100 is an apocalyptic number.

12100212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12100212100 is an abundant number, since it is smaller than the sum of its proper divisors (14157248374).

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

12100212100 is a wasteful number, since it uses less digits than its factorization.

12100212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121002135 (or 121002128 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12100212100 its reverse (121200121), we get a palindrome (12221412221).

It can be divided in two parts, 1210021 and 2100, that added together give a palindrome (1212121).

The spelling of 12100212100 in words is "twelve billion, one hundred million, two hundred twelve thousand, one hundred".