12001000023 has 24 divisors (see below), whose sum is σ = 18511009920. Its totient is φ = 7475590080.

The previous prime is 12001000003. The next prime is 12001000031. The reversal of 12001000023 is 32000010021.

It is a happy number.

It is not a de Polignac number, because 12001000023 - 2¹² = 12000995927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12000999969 and 12001000014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001000003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 733536 + ... + 749717.

It is an arithmetic number, because the mean of its divisors is an integer number (771292080).

Almost surely, 2^12001000023 is an apocalyptic number.

12001000023 is a deficient number, since it is larger than the sum of its proper divisors (6510009897).

12001000023 is a wasteful number, since it uses less digits than its factorization.

12001000023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483319 (or 1483316 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 12001000023 its reverse (32000010021), we get a palindrome (44001010044).

The spelling of 12001000023 in words is "twelve billion, one million, twenty-three", and thus it is an aban number and an uban number.