31231121113331 has 8 divisors (see below), whose sum is σ = 31295881359600. Its totient is φ = 31166396059680.

The previous prime is 31231121113261. The next prime is 31231121113369. The reversal of 31231121113331 is 13331112113213.

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

It is a cyclic number.

It is not a de Polignac number, because 31231121113331 - 2¹⁴ = 31231121096947 is a prime.

It is a super-2 number, since 2×31231121113331² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31231121113331.

It is not an unprimeable number, because it can be changed into a prime (31231421113331) 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, 7021076 + ... + 10571553.

It is an arithmetic number, because the mean of its divisors is an integer number (3911985169950).

Almost surely, 2^{31231121113331} is an apocalyptic number.

31231121113331 is a deficient number, since it is larger than the sum of its proper divisors (64760246269).

31231121113331 is a wasteful number, since it uses less digits than its factorization.

31231121113331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17596309.

The product of its digits is 972, while the sum is 26.

Adding to 31231121113331 its reverse (13331112113213), we get a palindrome (44562233226544).

The spelling of 31231121113331 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty-one million, one hundred thirteen thousand, three hundred thirty-one".