12031021123 has 8 divisors (see below), whose sum is σ = 13125792240. Its totient is φ = 10936423680.

The previous prime is 12031021117. The next prime is 12031021133. The reversal of 12031021123 is 32112013021.

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-12031021123 is a prime.

It is a super-2 number, since 2×12031021123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12031021097 and 12031021106.

It is not an unprimeable number, because it can be changed into a prime (12031021133) 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, 132411 + ... + 203947.

It is an arithmetic number, because the mean of its divisors is an integer number (1640724030).

Almost surely, 2^12031021123 is an apocalyptic number.

12031021123 is a deficient number, since it is larger than the sum of its proper divisors (1094771117).

12031021123 is a wasteful number, since it uses less digits than its factorization.

12031021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86837.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12031021123 its reverse (32112013021), we get a palindrome (44143034144).

The spelling of 12031021123 in words is "twelve billion, thirty-one million, twenty-one thousand, one hundred twenty-three".