31331021110131 has 8 divisors (see below), whose sum is σ = 41775734740624. Its totient is φ = 20886827443200.

The previous prime is 31331021110097. The next prime is 31331021110189. The reversal of 31331021110131 is 13101112013313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31331021110131 - 2³¹ = 31328873626483 is a prime.

It is a super-2 number, since 2×31331021110131² (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 = 31331021110098 and 31331021110107.

It is not an unprimeable number, because it can be changed into a prime (31331021110331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129850270 + ... + 130091331.

It is an arithmetic number, because the mean of its divisors is an integer number (5221966842578).

Almost surely, 2^{31331021110131} is an apocalyptic number.

31331021110131 is a deficient number, since it is larger than the sum of its proper divisors (10444713630493).

31331021110131 is a wasteful number, since it uses less digits than its factorization.

31331021110131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259981781.

The product of its (nonzero) digits is 162, while the sum is 21.

Adding to 31331021110131 its reverse (13101112013313), we get a palindrome (44432133123444).

The spelling of 31331021110131 in words is "thirty-one trillion, three hundred thirty-one billion, twenty-one million, one hundred ten thousand, one hundred thirty-one".