1312211331201 has 4 divisors (see below), whose sum is σ = 1749615108272. Its totient is φ = 874807554132.

The previous prime is 1312211331173. The next prime is 1312211331203. The reversal of 1312211331201 is 1021331122131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1312211331201 - 2⁵ = 1312211331169 is a prime.

It is a super-2 number, since 2×1312211331201² (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 (1312211331203) 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, 218701888531 + ... + 218701888536.

It is an arithmetic number, because the mean of its divisors is an integer number (437403777068).

Almost surely, 2^{1312211331201} is an apocalyptic number.

It is an amenable number.

1312211331201 is a deficient number, since it is larger than the sum of its proper divisors (437403777071).

1312211331201 is an equidigital number, since it uses as much as digits as its factorization.

1312211331201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437403777070.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1312211331201 its reverse (1021331122131), we get a palindrome (2333542453332).

The spelling of 1312211331201 in words is "one trillion, three hundred twelve billion, two hundred eleven million, three hundred thirty-one thousand, two hundred one".