31030232123 has 4 divisors (see below), whose sum is σ = 33851162328. Its totient is φ = 28209301920.

The previous prime is 31030232053. The next prime is 31030232159. The reversal of 31030232123 is 32123203013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31030232123 - 2⁸ = 31030231867 is a prime.

It is a super-2 number, since 2×31030232123² (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 = 31030232095 and 31030232104.

It is not an unprimeable number, because it can be changed into a prime (31030432123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1410465086 + ... + 1410465107.

It is an arithmetic number, because the mean of its divisors is an integer number (8462790582).

Almost surely, 2^31030232123 is an apocalyptic number.

31030232123 is a deficient number, since it is larger than the sum of its proper divisors (2820930205).

31030232123 is a wasteful number, since it uses less digits than its factorization.

31030232123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820930204.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31030232123 its reverse (32123203013), we get a palindrome (63153435136).

The spelling of 31030232123 in words is "thirty-one billion, thirty million, two hundred thirty-two thousand, one hundred twenty-three".