1311640233251 has 2 divisors, whose sum is σ = 1311640233252. Its totient is φ = 1311640233250.

The previous prime is 1311640233247. The next prime is 1311640233271. The reversal of 1311640233251 is 1523320461131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311640233251 - 2² = 1311640233247 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311640233271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655820116625 + 655820116626.

It is an arithmetic number, because the mean of its divisors is an integer number (655820116626).

Almost surely, 2^{1311640233251} is an apocalyptic number.

1311640233251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311640233251 is an equidigital number, since it uses as much as digits as its factorization.

1311640233251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 1311640233251 its reverse (1523320461131), we get a palindrome (2834960694382).

The spelling of 1311640233251 in words is "one trillion, three hundred eleven billion, six hundred forty million, two hundred thirty-three thousand, two hundred fifty-one".