12031221313 has 2 divisors, whose sum is σ = 12031221314. Its totient is φ = 12031221312.

The previous prime is 12031221281. The next prime is 12031221337. The reversal of 12031221313 is 31312213021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11989593009 + 41628304 = 109497^2 + 6452^2 .

It is a cyclic number.

It is not a de Polignac number, because 12031221313 - 2⁵ = 12031221281 is a prime.

It is a super-3 number, since 3×12031221313³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (12031221913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015610656 + 6015610657.

It is an arithmetic number, because the mean of its divisors is an integer number (6015610657).

Almost surely, 2^12031221313 is an apocalyptic number.

It is an amenable number.

12031221313 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031221313 is an equidigital number, since it uses as much as digits as its factorization.

12031221313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12031221313 its reverse (31312213021), we get a palindrome (43343434334).

The spelling of 12031221313 in words is "twelve billion, thirty-one million, two hundred twenty-one thousand, three hundred thirteen".