12121131229 has 4 divisors (see below), whose sum is σ = 12121422784. Its totient is φ = 12120839676.

The previous prime is 12121131199. The next prime is 12121131241. The reversal of 12121131229 is 92213112121.

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 12121131229 - 2¹³ = 12121123037 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 (12121131259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70437 + ... + 170890.

It is an arithmetic number, because the mean of its divisors is an integer number (3030355696).

Almost surely, 2^12121131229 is an apocalyptic number.

It is an amenable number.

12121131229 is a deficient number, since it is larger than the sum of its proper divisors (291555).

12121131229 is an equidigital number, since it uses as much as digits as its factorization.

12121131229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291554.

The product of its digits is 432, while the sum is 25.

The spelling of 12121131229 in words is "twelve billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred twenty-nine".