12231121023 has 12 divisors (see below), whose sum is σ = 19273281768. Its totient is φ = 7412800560.

The previous prime is 12231120989. The next prime is 12231121027. The reversal of 12231121023 is 32012113221.

12231121023 is a `hidden beast` number, since 122 + 311 + 210 + 23 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-12231121023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12231120987 and 12231121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231121027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61773240 + ... + 61773437.

It is an arithmetic number, because the mean of its divisors is an integer number (1606106814).

Almost surely, 2^12231121023 is an apocalyptic number.

12231121023 is a deficient number, since it is larger than the sum of its proper divisors (7042160745).

12231121023 is a wasteful number, since it uses less digits than its factorization.

12231121023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123546694 (or 123546691 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12231121023 its reverse (32012113221), we get a palindrome (44243234244).

The spelling of 12231121023 in words is "twelve billion, two hundred thirty-one million, one hundred twenty-one thousand, twenty-three".