12285121929 has 4 divisors (see below), whose sum is σ = 16380162576. Its totient is φ = 8190081284.

The previous prime is 12285121903. The next prime is 12285121939. The reversal of 12285121929 is 92912158221.

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.

It is a cyclic number.

It is not a de Polignac number, because 12285121929 - 2²⁷ = 12150904201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12285121939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2047520319 + ... + 2047520324.

It is an arithmetic number, because the mean of its divisors is an integer number (4095040644).

Almost surely, 2^12285121929 is an apocalyptic number.

It is an amenable number.

12285121929 is a deficient number, since it is larger than the sum of its proper divisors (4095040647).

12285121929 is an equidigital number, since it uses as much as digits as its factorization.

12285121929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4095040646.

The product of its digits is 51840, while the sum is 42.

The spelling of 12285121929 in words is "twelve billion, two hundred eighty-five million, one hundred twenty-one thousand, nine hundred twenty-nine".