2122202212121 has 4 divisors (see below), whose sum is σ = 2158171741200. Its totient is φ = 2086232683044.

The previous prime is 2122202212103. The next prime is 2122202212171. The reversal of 2122202212121 is 1212122022212.

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 2122202212121 - 2³⁰ = 2121128470297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2122202212093 and 2122202212102.

It is not an unprimeable number, because it can be changed into a prime (2122202212171) 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, 17984764451 + ... + 17984764568.

It is an arithmetic number, because the mean of its divisors is an integer number (539542935300).

Almost surely, 2^{2122202212121} is an apocalyptic number.

It is an amenable number.

2122202212121 is a deficient number, since it is larger than the sum of its proper divisors (35969529079).

2122202212121 is an equidigital number, since it uses as much as digits as its factorization.

2122202212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35969529078.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2122202212121 its reverse (1212122022212), we get a palindrome (3334324234333).

The spelling of 2122202212121 in words is "two trillion, one hundred twenty-two billion, two hundred two million, two hundred twelve thousand, one hundred twenty-one".