12212203121 has 4 divisors (see below), whose sum is σ = 12223276032. Its totient is φ = 12201130212.

The previous prime is 12212203109. The next prime is 12212203141. The reversal of 12212203121 is 12130221221.

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 12212203121 - 2²⁶ = 12145094257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12212203121.

It is not an unprimeable number, because it can be changed into a prime (12212203141) 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, 5534801 + ... + 5537006.

It is an arithmetic number, because the mean of its divisors is an integer number (3055819008).

Almost surely, 2^12212203121 is an apocalyptic number.

It is an amenable number.

12212203121 is a deficient number, since it is larger than the sum of its proper divisors (11072911).

12212203121 is a wasteful number, since it uses less digits than its factorization.

12212203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11072910.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12212203121 its reverse (12130221221), we get a palindrome (24342424342).

The spelling of 12212203121 in words is "twelve billion, two hundred twelve million, two hundred three thousand, one hundred twenty-one".