12103220400 has 120 divisors (see below), whose sum is σ = 40811286720. Its totient is φ = 3057649920.

The previous prime is 12103220387. The next prime is 12103220407. The reversal of 12103220400 is 402230121.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12103220400.

It is not an unprimeable number, because it can be changed into a prime (12103220407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242622 + ... + 288221.

It is an arithmetic number, because the mean of its divisors is an integer number (340094056).

Almost surely, 2^12103220400 is an apocalyptic number.

12103220400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12103220400 is an abundant number, since it is smaller than the sum of its proper divisors (28708066320).

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

12103220400 is a wasteful number, since it uses less digits than its factorization.

12103220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530883 (or 530872 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 12103220400 its reverse (402230121), we get a palindrome (12505450521).

The spelling of 12103220400 in words is "twelve billion, one hundred three million, two hundred twenty thousand, four hundred".