12212220111121 has 4 divisors (see below), whose sum is σ = 12251999330032. Its totient is φ = 12172440892212.

The previous prime is 12212220111061. The next prime is 12212220111127. The reversal of 12212220111121 is 12111102221221.

It is a happy number.

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 12212220111121 - 2⁹ = 12212220110609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12212220111127) 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, 19889608995 + ... + 19889609608.

It is an arithmetic number, because the mean of its divisors is an integer number (3062999832508).

Almost surely, 2^{12212220111121} is an apocalyptic number.

It is an amenable number.

12212220111121 is a deficient number, since it is larger than the sum of its proper divisors (39779218911).

12212220111121 is an equidigital number, since it uses as much as digits as its factorization.

12212220111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39779218910.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12212220111121 its reverse (12111102221221), we get a palindrome (24323322332342).

The spelling of 12212220111121 in words is "twelve trillion, two hundred twelve billion, two hundred twenty million, one hundred eleven thousand, one hundred twenty-one".