31011232001331 has 4 divisors (see below), whose sum is σ = 41348309335112. Its totient is φ = 20674154667552.

The previous prime is 31011232001279. The next prime is 31011232001363. The reversal of 31011232001331 is 13310023211013.

It is a happy number.

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

It is not a de Polignac number, because 31011232001331 - 2¹⁴ = 31011231984947 is a prime.

It is a super-2 number, since 2×31011232001331² (a number of 28 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 = 31011232001298 and 31011232001307.

It is not an unprimeable number, because it can be changed into a prime (31011232001371) 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, 5168538666886 + ... + 5168538666891.

It is an arithmetic number, because the mean of its divisors is an integer number (10337077333778).

Almost surely, 2^{31011232001331} is an apocalyptic number.

31011232001331 is a deficient number, since it is larger than the sum of its proper divisors (10337077333781).

31011232001331 is a wasteful number, since it uses less digits than its factorization.

31011232001331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10337077333780.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31011232001331 its reverse (13310023211013), we get a palindrome (44321255212344).

The spelling of 31011232001331 in words is "thirty-one trillion, eleven billion, two hundred thirty-two million, one thousand, three hundred thirty-one".