12121323211 has 8 divisors (see below), whose sum is σ = 12233627280. Its totient is φ = 12009107712.

The previous prime is 12121323197. The next prime is 12121323233. The reversal of 12121323211 is 11232312121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12121323211 - 2⁷ = 12121323083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121323251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270631 + ... + 312223.

It is an arithmetic number, because the mean of its divisors is an integer number (1529203410).

Almost surely, 2^12121323211 is an apocalyptic number.

12121323211 is a deficient number, since it is larger than the sum of its proper divisors (112304069).

12121323211 is a wasteful number, since it uses less digits than its factorization.

12121323211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44285.

The product of its digits is 144, while the sum is 19.

Adding to 12121323211 its reverse (11232312121), we get a palindrome (23353635332).

The spelling of 12121323211 in words is "twelve billion, one hundred twenty-one million, three hundred twenty-three thousand, two hundred eleven".