31231121323 has 8 divisors (see below), whose sum is σ = 31689842256. Its totient is φ = 30775332000.

The previous prime is 31231121303. The next prime is 31231121377. The reversal of 31231121323 is 32312113213.

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 31231121323 - 2¹³ = 31231113131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31231121294 and 31231121303.

It is not an unprimeable number, because it can be changed into a prime (31231121303) 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, 711436 + ... + 754057.

It is an arithmetic number, because the mean of its divisors is an integer number (3961230282).

Almost surely, 2^31231121323 is an apocalyptic number.

31231121323 is a deficient number, since it is larger than the sum of its proper divisors (458720933).

31231121323 is a wasteful number, since it uses less digits than its factorization.

31231121323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465805.

The product of its digits is 648, while the sum is 22.

Adding to 31231121323 its reverse (32312113213), we get a palindrome (63543234536).

The spelling of 31231121323 in words is "thirty-one billion, two hundred thirty-one million, one hundred twenty-one thousand, three hundred twenty-three".