12011315023 has 4 divisors (see below), whose sum is σ = 12304273968. Its totient is φ = 11718356080.

The previous prime is 12011315009. The next prime is 12011315119. The reversal of 12011315023 is 32051311021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011315023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011315123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146479411 + ... + 146479492.

It is an arithmetic number, because the mean of its divisors is an integer number (3076068492).

Almost surely, 2^12011315023 is an apocalyptic number.

12011315023 is a deficient number, since it is larger than the sum of its proper divisors (292958945).

12011315023 is an equidigital number, since it uses as much as digits as its factorization.

12011315023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292958944.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 12011315023 its reverse (32051311021), we get a palindrome (44062626044).

The spelling of 12011315023 in words is "twelve billion, eleven million, three hundred fifteen thousand, twenty-three".