12243135400 has 24 divisors (see below), whose sum is σ = 28465290270. Its totient is φ = 4897254080.

The previous prime is 12243135389. The next prime is 12243135409. The reversal of 12243135400 is 453134221.

It can be written as a sum of positive squares in 3 ways, for example, as 7863078276 + 4380057124 = 88674^2 + 66182^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (12243135409) 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, 30607639 + ... + 30608038.

Almost surely, 2^12243135400 is an apocalyptic number.

12243135400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12243135400 is an abundant number, since it is smaller than the sum of its proper divisors (16222154870).

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

12243135400 is a wasteful number, since it uses less digits than its factorization.

12243135400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61215693 (or 61215684 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 12243135400 its reverse (453134221), we get a palindrome (12696269621).

The spelling of 12243135400 in words is "twelve billion, two hundred forty-three million, one hundred thirty-five thousand, four hundred".