12020312100 has 72 divisors (see below), whose sum is σ = 35718769408. Its totient is φ = 3118780800.

The previous prime is 12020312069. The next prime is 12020312131. The reversal of 12020312100 is 121302021.

It is an interprime number because it is at equal distance from previous prime (12020312069) and next prime (12020312131).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 530356 + ... + 552555.

Almost surely, 2^12020312100 is an apocalyptic number.

12020312100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12020312100 is an abundant number, since it is smaller than the sum of its proper divisors (23698457308).

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

12020312100 is a wasteful number, since it uses less digits than its factorization.

12020312100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082965 (or 1082958 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 12020312100 its reverse (121302021), we get a palindrome (12141614121).

The spelling of 12020312100 in words is "twelve billion, twenty million, three hundred twelve thousand, one hundred".