12503132121 has 4 divisors (see below), whose sum is σ = 16670842832. Its totient is φ = 8335421412.

The previous prime is 12503132113. The next prime is 12503132141. The reversal of 12503132121 is 12123130521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12503132121 - 2³ = 12503132113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12503132101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2083855351 + ... + 2083855356.

It is an arithmetic number, because the mean of its divisors is an integer number (4167710708).

Almost surely, 2^12503132121 is an apocalyptic number.

It is an amenable number.

12503132121 is a deficient number, since it is larger than the sum of its proper divisors (4167710711).

12503132121 is an equidigital number, since it uses as much as digits as its factorization.

12503132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167710710.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 12503132121 its reverse (12123130521), we get a palindrome (24626262642).

The spelling of 12503132121 in words is "twelve billion, five hundred three million, one hundred thirty-two thousand, one hundred twenty-one".