1312311332201 has 4 divisors (see below), whose sum is σ = 1319896947012. Its totient is φ = 1304725717392.

The previous prime is 1312311332197. The next prime is 1312311332209. The reversal of 1312311332201 is 1022331132131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 485077425625 + 827233906576 = 696475^2 + 909524^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312311332201 - 2² = 1312311332197 is a prime.

It is a super-2 number, since 2×1312311332201² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312311332209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3792807146 + ... + 3792807491.

It is an arithmetic number, because the mean of its divisors is an integer number (329974236753).

Almost surely, 2^{1312311332201} is an apocalyptic number.

It is an amenable number.

1312311332201 is a deficient number, since it is larger than the sum of its proper divisors (7585614811).

1312311332201 is an equidigital number, since it uses as much as digits as its factorization.

1312311332201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7585614810.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1312311332201 its reverse (1022331132131), we get a palindrome (2334642464332).

The spelling of 1312311332201 in words is "one trillion, three hundred twelve billion, three hundred eleven million, three hundred thirty-two thousand, two hundred one".