311141121431213 has 4 divisors (see below), whose sum is σ = 311162211469788. Its totient is φ = 311120031392640.

The previous prime is 311141121431191. The next prime is 311141121431221. The reversal of 311141121431213 is 312134121141113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54820445070889 + 256320676360324 = 7404083^2 + 16010018^2 .

It is a cyclic number.

It is not a de Polignac number, because 311141121431213 - 2⁸ = 311141121430957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311141121431293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10544997158 + ... + 10545026663.

It is an arithmetic number, because the mean of its divisors is an integer number (77790552867447).

Almost surely, 2^{311141121431213} is an apocalyptic number.

It is an amenable number.

311141121431213 is a deficient number, since it is larger than the sum of its proper divisors (21090038575).

311141121431213 is a wasteful number, since it uses less digits than its factorization.

311141121431213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21090038574.

The product of its digits is 1728, while the sum is 29.

Adding to 311141121431213 its reverse (312134121141113), we get a palindrome (623275242572326).

The spelling of 311141121431213 in words is "three hundred eleven trillion, one hundred forty-one billion, one hundred twenty-one million, four hundred thirty-one thousand, two hundred thirteen".