12311311451331 has 4 divisors (see below), whose sum is σ = 16415081935112. Its totient is φ = 8207540967552.

The previous prime is 12311311451323. The next prime is 12311311451347. The reversal of 12311311451331 is 13315411311321.

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

It is not a de Polignac number, because 12311311451331 - 2³ = 12311311451323 is a prime.

It is a super-2 number, since 2×12311311451331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12311311451371) 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, 2051885241886 + ... + 2051885241891.

It is an arithmetic number, because the mean of its divisors is an integer number (4103770483778).

Almost surely, 2^{12311311451331} is an apocalyptic number.

12311311451331 is a deficient number, since it is larger than the sum of its proper divisors (4103770483781).

12311311451331 is an equidigital number, since it uses as much as digits as its factorization.

12311311451331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4103770483780.

The product of its digits is 3240, while the sum is 30.

Adding to 12311311451331 its reverse (13315411311321), we get a palindrome (25626722762652).

The spelling of 12311311451331 in words is "twelve trillion, three hundred eleven billion, three hundred eleven million, four hundred fifty-one thousand, three hundred thirty-one".