31411121331 has 4 divisors (see below), whose sum is σ = 41881495112. Its totient is φ = 20940747552.

The previous prime is 31411121327. The next prime is 31411121341. The reversal of 31411121331 is 13312111413.

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

It is not a de Polignac number, because 31411121331 - 2² = 31411121327 is a prime.

It is a super-2 number, since 2×31411121331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31411121298 and 31411121307.

It is not an unprimeable number, because it can be changed into a prime (31411121311) 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, 5235186886 + ... + 5235186891.

It is an arithmetic number, because the mean of its divisors is an integer number (10470373778).

Almost surely, 2^31411121331 is an apocalyptic number.

31411121331 is a deficient number, since it is larger than the sum of its proper divisors (10470373781).

31411121331 is a wasteful number, since it uses less digits than its factorization.

31411121331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10470373780.

The product of its digits is 216, while the sum is 21.

Adding to 31411121331 its reverse (13312111413), we get a palindrome (44723232744).

The spelling of 31411121331 in words is "thirty-one billion, four hundred eleven million, one hundred twenty-one thousand, three hundred thirty-one".