12212031257 has 2 divisors, whose sum is σ = 12212031258. Its totient is φ = 12212031256.

The previous prime is 12212031239. The next prime is 12212031259. The reversal of 12212031257 is 75213021221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6275174656 + 5936856601 = 79216^2 + 77051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212031257 is a prime.

Together with 12212031259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12212031259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106015628 + 6106015629.

It is an arithmetic number, because the mean of its divisors is an integer number (6106015629).

Almost surely, 2^12212031257 is an apocalyptic number.

It is an amenable number.

12212031257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212031257 is an equidigital number, since it uses as much as digits as its factorization.

12212031257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 12212031257 its reverse (75213021221), we get a palindrome (87425052478).

The spelling of 12212031257 in words is "twelve billion, two hundred twelve million, thirty-one thousand, two hundred fifty-seven".