12013521323 has 4 divisors (see below), whose sum is σ = 12043782480. Its totient is φ = 11983260168.

The previous prime is 12013521313. The next prime is 12013521337. The reversal of 12013521323 is 32312531021.

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

It is a cyclic number.

It is not a de Polignac number, because 12013521323 - 2⁶ = 12013521259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12013521313) 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, 15129983 + ... + 15130776.

It is an arithmetic number, because the mean of its divisors is an integer number (3010945620).

Almost surely, 2^12013521323 is an apocalyptic number.

12013521323 is a deficient number, since it is larger than the sum of its proper divisors (30261157).

12013521323 is an equidigital number, since it uses as much as digits as its factorization.

12013521323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30261156.

The product of its (nonzero) digits is 1080, while the sum is 23.

The spelling of 12013521323 in words is "twelve billion, thirteen million, five hundred twenty-one thousand, three hundred twenty-three".