12121012313 has 4 divisors (see below), whose sum is σ = 12378906240. Its totient is φ = 11863118388.

The previous prime is 12121012303. The next prime is 12121012331. The reversal of 12121012313 is 31321012121.

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 12121012313 - 2⁴ = 12121012297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121012291 and 12121012300.

It is not an unprimeable number, because it can be changed into a prime (12121012303) 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, 128946893 + ... + 128946986.

It is an arithmetic number, because the mean of its divisors is an integer number (3094726560).

Almost surely, 2^12121012313 is an apocalyptic number.

It is an amenable number.

12121012313 is a deficient number, since it is larger than the sum of its proper divisors (257893927).

12121012313 is an equidigital number, since it uses as much as digits as its factorization.

12121012313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257893926.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12121012313 its reverse (31321012121), we get a palindrome (43442024434).

The spelling of 12121012313 in words is "twelve billion, one hundred twenty-one million, twelve thousand, three hundred thirteen".