31032120123 has 24 divisors (see below), whose sum is σ = 46790040960. Its totient is φ = 19795754880.

The previous prime is 31032119971. The next prime is 31032120149. The reversal of 31032120123 is 32102123013.

31032120123 is a `hidden beast` number, since 310 + 321 + 20 + 12 + 3 = 666.

It is not a de Polignac number, because 31032120123 - 2¹⁸ = 31031857979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31032120096 and 31032120105.

It is not an unprimeable number, because it can be changed into a prime (31032120523) 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 23 ways as a sum of consecutive naturals, for example, 600036 + ... + 649697.

It is an arithmetic number, because the mean of its divisors is an integer number (1949585040).

Almost surely, 2^31032120123 is an apocalyptic number.

31032120123 is a deficient number, since it is larger than the sum of its proper divisors (15757920837).

31032120123 is a wasteful number, since it uses less digits than its factorization.

31032120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249859 (or 1249856 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31032120123 its reverse (32102123013), we get a palindrome (63134243136).

The spelling of 31032120123 in words is "thirty-one billion, thirty-two million, one hundred twenty thousand, one hundred twenty-three".