31121411431 has 4 divisors (see below), whose sum is σ = 33950630664. Its totient is φ = 28292192200.

The previous prime is 31121411429. The next prime is 31121411441. The reversal of 31121411431 is 13411412113.

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 31121411431 - 2¹ = 31121411429 is a prime.

It is a super-2 number, since 2×31121411431² (a number of 22 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 (31121411401) 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, 1414609600 + ... + 1414609621.

It is an arithmetic number, because the mean of its divisors is an integer number (8487657666).

Almost surely, 2^31121411431 is an apocalyptic number.

31121411431 is a deficient number, since it is larger than the sum of its proper divisors (2829219233).

31121411431 is a wasteful number, since it uses less digits than its factorization.

31121411431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829219232.

The product of its digits is 288, while the sum is 22.

Adding to 31121411431 its reverse (13411412113), we get a palindrome (44532823544).

The spelling of 31121411431 in words is "thirty-one billion, one hundred twenty-one million, four hundred eleven thousand, four hundred thirty-one".