12121032013 has 4 divisors (see below), whose sum is σ = 12122045280. Its totient is φ = 12120018748.

The previous prime is 12121031987. The next prime is 12121032017. The reversal of 12121032013 is 31023012121.

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 a cyclic number.

It is not a de Polignac number, because 12121032013 - 2⁵ = 12121031981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121032017) 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, 488473 + ... + 512686.

It is an arithmetic number, because the mean of its divisors is an integer number (3030511320).

Almost surely, 2^12121032013 is an apocalyptic number.

It is an amenable number.

12121032013 is a deficient number, since it is larger than the sum of its proper divisors (1013267).

12121032013 is a wasteful number, since it uses less digits than its factorization.

12121032013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013266.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12121032013 its reverse (31023012121), we get a palindrome (43144044134).

The spelling of 12121032013 in words is "twelve billion, one hundred twenty-one million, thirty-two thousand, thirteen".