31230111123 has 6 divisors (see below), whose sum is σ = 45110160524. Its totient is φ = 20820074076.

The previous prime is 31230111053. The next prime is 31230111131. The reversal of 31230111123 is 32111103213.

It is not a de Polignac number, because 31230111123 - 2¹⁷ = 31229980051 is a prime.

It is a super-2 number, since 2×31230111123² (a number of 22 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 = 31230111096 and 31230111105.

It is not an unprimeable number, because it can be changed into a prime (31230111163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1735006165 + ... + 1735006182.

Almost surely, 2^31230111123 is an apocalyptic number.

31230111123 is a deficient number, since it is larger than the sum of its proper divisors (13880049401).

31230111123 is a wasteful number, since it uses less digits than its factorization.

31230111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3470012353 (or 3470012350 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31230111123 its reverse (32111103213), we get a palindrome (63341214336).

The spelling of 31230111123 in words is "thirty-one billion, two hundred thirty million, one hundred eleven thousand, one hundred twenty-three".