12222212101121 has 4 divisors (see below), whose sum is σ = 13333322292144. Its totient is φ = 11111101910100.

The previous prime is 12222212101069. The next prime is 12222212101157. The reversal of 12222212101121 is 12110121222221.

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 12222212101121 - 2²² = 12222207906817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12222212101093 and 12222212101102.

It is not an unprimeable number, because it can be changed into a prime (12222212121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555555095495 + ... + 555555095516.

It is an arithmetic number, because the mean of its divisors is an integer number (3333330573036).

Almost surely, 2^{12222212101121} is an apocalyptic number.

12222212101121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12222212101121 is a deficient number, since it is larger than the sum of its proper divisors (1111110191023).

12222212101121 is a wasteful number, since it uses less digits than its factorization.

12222212101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111110191022.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12222212101121 its reverse (12110121222221), we get a palindrome (24332333323342).

The spelling of 12222212101121 in words is "twelve trillion, two hundred twenty-two billion, two hundred twelve million, one hundred one thousand, one hundred twenty-one".