1311226352031 has 4 divisors (see below), whose sum is σ = 1748301802712. Its totient is φ = 874150901352.

The previous prime is 1311226352027. The next prime is 1311226352041. The reversal of 1311226352031 is 1302536221131.

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

It is not a de Polignac number, because 1311226352031 - 2² = 1311226352027 is a prime.

It is a super-2 number, since 2×1311226352031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311226352031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311226352041) 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, 218537725336 + ... + 218537725341.

It is an arithmetic number, because the mean of its divisors is an integer number (437075450678).

Almost surely, 2^{1311226352031} is an apocalyptic number.

1311226352031 is a deficient number, since it is larger than the sum of its proper divisors (437075450681).

1311226352031 is an equidigital number, since it uses as much as digits as its factorization.

1311226352031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437075450680.

The product of its (nonzero) digits is 6480, while the sum is 30.

The spelling of 1311226352031 in words is "one trillion, three hundred eleven billion, two hundred twenty-six million, three hundred fifty-two thousand, thirty-one".