12212211222121 has 8 divisors (see below), whose sum is σ = 12926774599200. Its totient is φ = 11504829386880.

The previous prime is 12212211222103. The next prime is 12212211222193. The reversal of 12212211222121 is 12122211221221.

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

It is a cyclic number.

It is not a de Polignac number, because 12212211222121 - 2³⁵ = 12177851483753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212211222092 and 12212211222101.

It is not an unprimeable number, because it can be changed into a prime (12212211222821) 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, 1795381960 + ... + 1795388761.

It is an arithmetic number, because the mean of its divisors is an integer number (1615846824900).

Almost surely, 2^{12212211222121} is an apocalyptic number.

It is an amenable number.

12212211222121 is a deficient number, since it is larger than the sum of its proper divisors (714563377079).

12212211222121 is a wasteful number, since it uses less digits than its factorization.

12212211222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590770919.

The product of its digits is 256, while the sum is 22.

Adding to 12212211222121 its reverse (12122211221221), we get a palindrome (24334422443342).

The spelling of 12212211222121 in words is "twelve trillion, two hundred twelve billion, two hundred eleven million, two hundred twenty-two thousand, one hundred twenty-one".