1311254026061 has 4 divisors (see below), whose sum is σ = 1498576029792. Its totient is φ = 1123932022332.

The previous prime is 1311254025901. The next prime is 1311254026063. The reversal of 1311254026061 is 1606204521131.

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 1311254026061 - 2¹⁸ = 1311253763917 is a prime.

It is a super-2 number, since 2×1311254026061² (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 (1311254026063) 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, 93661001855 + ... + 93661001868.

It is an arithmetic number, because the mean of its divisors is an integer number (374644007448).

Almost surely, 2^{1311254026061} is an apocalyptic number.

It is an amenable number.

1311254026061 is a deficient number, since it is larger than the sum of its proper divisors (187322003731).

1311254026061 is an equidigital number, since it uses as much as digits as its factorization.

1311254026061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187322003730.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 1311254026061 its reverse (1606204521131), we get a palindrome (2917458547192).

The spelling of 1311254026061 in words is "one trillion, three hundred eleven billion, two hundred fifty-four million, twenty-six thousand, sixty-one".