12011231023 has 8 divisors (see below), whose sum is σ = 13107813840. Its totient is φ = 10915423680.

The previous prime is 12011231009. The next prime is 12011231027. The reversal of 12011231023 is 32013211021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12011231023 - 2²⁵ = 11977676591 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12011230988 and 12011231006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011231027) 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, 161238 + ... + 223651.

It is an arithmetic number, because the mean of its divisors is an integer number (1638476730).

Almost surely, 2^12011231023 is an apocalyptic number.

12011231023 is a deficient number, since it is larger than the sum of its proper divisors (1096582817).

12011231023 is a wasteful number, since it uses less digits than its factorization.

12011231023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387737.

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

Adding to 12011231023 its reverse (32013211021), we get a palindrome (44024442044).

The spelling of 12011231023 in words is "twelve billion, eleven million, two hundred thirty-one thousand, twenty-three".