2012323129 has 4 divisors (see below), whose sum is σ = 2015683200. Its totient is φ = 2008963060.

The previous prime is 2012323087. The next prime is 2012323141. The reversal of 2012323129 is 9213232102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9213232102 = 2 ⋅4606616051.

It is a cyclic number.

It is not a de Polignac number, because 2012323129 - 2²⁵ = 1978768697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012323529) 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, 1679137 + ... + 1680334.

It is an arithmetic number, because the mean of its divisors is an integer number (503920800).

Almost surely, 2^2012323129 is an apocalyptic number.

It is an amenable number.

2012323129 is a deficient number, since it is larger than the sum of its proper divisors (3360071).

2012323129 is an equidigital number, since it uses as much as digits as its factorization.

2012323129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360070.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2012323129 is about 44858.9247419062. The cubic root of 2012323129 is about 1262.5034482015.

The spelling of 2012323129 in words is "two billion, twelve million, three hundred twenty-three thousand, one hundred twenty-nine".