12122210122221 has 8 divisors (see below), whose sum is σ = 16163155524640. Its totient is φ = 8081369067312.

The previous prime is 12122210122219. The next prime is 12122210122369. The reversal of 12122210122221 is 12222101222121.

12122210122221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12122210122221 - 2¹ = 12122210122219 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 (12122210122721) 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, 25815406 + ... + 26280783.

It is an arithmetic number, because the mean of its divisors is an integer number (2020394440580).

Almost surely, 2^{12122210122221} is an apocalyptic number.

It is an amenable number.

12122210122221 is a deficient number, since it is larger than the sum of its proper divisors (4040945402419).

12122210122221 is an equidigital number, since it uses as much as digits as its factorization.

12122210122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52173755.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12122210122221 its reverse (12222101222121), we get a palindrome (24344311344342).

The spelling of 12122210122221 in words is "twelve trillion, one hundred twenty-two billion, two hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".