12031031213 has 2 divisors, whose sum is σ = 12031031214. Its totient is φ = 12031031212.

The previous prime is 12031031167. The next prime is 12031031251. The reversal of 12031031213 is 31213013021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10013404489 + 2017626724 = 100067^2 + 44918^2 .

It is a cyclic number.

It is not a de Polignac number, because 12031031213 - 2¹⁴ = 12031014829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12031031191 and 12031031200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12031031293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015515606 + 6015515607.

It is an arithmetic number, because the mean of its divisors is an integer number (6015515607).

Almost surely, 2^12031031213 is an apocalyptic number.

It is an amenable number.

12031031213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031031213 is an equidigital number, since it uses as much as digits as its factorization.

12031031213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12031031213 its reverse (31213013021), we get a palindrome (43244044234).

The spelling of 12031031213 in words is "twelve billion, thirty-one million, thirty-one thousand, two hundred thirteen".