1312021401311 has 4 divisors (see below), whose sum is σ = 1312033051224. Its totient is φ = 1312009751400.

The previous prime is 1312021401307. The next prime is 1312021401349. The reversal of 1312021401311 is 1131041202131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312021401311 - 2² = 1312021401307 is a prime.

It is a super-2 number, since 2×1312021401311² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312021401371) 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, 5654360 + ... + 5881821.

It is an arithmetic number, because the mean of its divisors is an integer number (328008262806).

Almost surely, 2^{1312021401311} is an apocalyptic number.

1312021401311 is a deficient number, since it is larger than the sum of its proper divisors (11649913).

1312021401311 is a wasteful number, since it uses less digits than its factorization.

1312021401311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11649912.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1312021401311 its reverse (1131041202131), we get a palindrome (2443062603442).

The spelling of 1312021401311 in words is "one trillion, three hundred twelve billion, twenty-one million, four hundred one thousand, three hundred eleven".