12120021313 has 2 divisors, whose sum is σ = 12120021314. Its totient is φ = 12120021312.

The previous prime is 12120021257. The next prime is 12120021367. The reversal of 12120021313 is 31312002121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11887977024 + 232044289 = 109032^2 + 15233^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120021313 - 2²⁹ = 11583150401 is a prime.

It is not a weakly prime, because it can be changed into another prime (12120021383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060010656 + 6060010657.

It is an arithmetic number, because the mean of its divisors is an integer number (6060010657).

Almost surely, 2^12120021313 is an apocalyptic number.

It is an amenable number.

12120021313 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120021313 is an equidigital number, since it uses as much as digits as its factorization.

12120021313 is an odious number, because the sum of its binary digits is odd.

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

Adding to 12120021313 its reverse (31312002121), we get a palindrome (43432023434).

The spelling of 12120021313 in words is "twelve billion, one hundred twenty million, twenty-one thousand, three hundred thirteen".