1313121222997 has 2 divisors, whose sum is σ = 1313121222998. Its totient is φ = 1313121222996.

The previous prime is 1313121222991. The next prime is 1313121223033. The reversal of 1313121222997 is 7992221213131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 984607691076 + 328513531921 = 992274^2 + 573161^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313121222997 - 2¹¹ = 1313121220949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313121222991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656560611498 + 656560611499.

It is an arithmetic number, because the mean of its divisors is an integer number (656560611499).

Almost surely, 2^{1313121222997} is an apocalyptic number.

It is an amenable number.

1313121222997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313121222997 is an equidigital number, since it uses as much as digits as its factorization.

1313121222997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The spelling of 1313121222997 in words is "one trillion, three hundred thirteen billion, one hundred twenty-one million, two hundred twenty-two thousand, nine hundred ninety-seven".