1312231122197 has 2 divisors, whose sum is σ = 1312231122198. Its totient is φ = 1312231122196.

The previous prime is 1312231122109. The next prime is 1312231122227. The reversal of 1312231122197 is 7912211322131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1284926534116 + 27304588081 = 1133546^2 + 165241^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312231122197 - 2⁸ = 1312231121941 is a prime.

It is a super-2 number, since 2×1312231122197² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312231127197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656115561098 + 656115561099.

It is an arithmetic number, because the mean of its divisors is an integer number (656115561099).

Almost surely, 2^{1312231122197} is an apocalyptic number.

It is an amenable number.

1312231122197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312231122197 is an equidigital number, since it uses as much as digits as its factorization.

1312231122197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The spelling of 1312231122197 in words is "one trillion, three hundred twelve billion, two hundred thirty-one million, one hundred twenty-two thousand, one hundred ninety-seven".