12112102101221 has 4 divisors (see below), whose sum is σ = 12749581159200. Its totient is φ = 11474623043244.

The previous prime is 12112102101163. The next prime is 12112102101241. The reversal of 12112102101221 is 12210120121121.

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 12112102101221 - 2³⁸ = 11837224194277 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 12112102101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112102101241) 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, 318739528961 + ... + 318739528998.

It is an arithmetic number, because the mean of its divisors is an integer number (3187395289800).

Almost surely, 2^{12112102101221} is an apocalyptic number.

It is an amenable number.

12112102101221 is a deficient number, since it is larger than the sum of its proper divisors (637479057979).

12112102101221 is an equidigital number, since it uses as much as digits as its factorization.

12112102101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637479057978.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12112102101221 its reverse (12210120121121), we get a palindrome (24322222222342).

The spelling of 12112102101221 in words is "twelve trillion, one hundred twelve billion, one hundred two million, one hundred one thousand, two hundred twenty-one".