31020123023231 has 8 divisors (see below), whose sum is σ = 31175946837360. Its totient is φ = 30864493143232.

The previous prime is 31020123023191. The next prime is 31020123023237. The reversal of 31020123023231 is 13232032102013.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31020123023231 is a prime.

It is a super-2 number, since 2×31020123023231² (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 = 31020123023197 and 31020123023206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020123023237) 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, 48162821 + ... + 48802638.

It is an arithmetic number, because the mean of its divisors is an integer number (3896993354670).

Almost surely, 2^{31020123023231} is an apocalyptic number.

31020123023231 is a deficient number, since it is larger than the sum of its proper divisors (155823814129).

31020123023231 is a wasteful number, since it uses less digits than its factorization.

31020123023231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96967065.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31020123023231 its reverse (13232032102013), we get a palindrome (44252155125244).

The spelling of 31020123023231 in words is "thirty-one trillion, twenty billion, one hundred twenty-three million, twenty-three thousand, two hundred thirty-one".