2122021111121 has 4 divisors (see below), whose sum is σ = 2167170496512. Its totient is φ = 2076871725732.

The previous prime is 2122021111109. The next prime is 2122021111157. The reversal of 2122021111121 is 1211111202212.

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 2122021111121 - 2⁶ = 2122021111057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2122021111121.

It is not an unprimeable number, because it can be changed into a prime (2122021114121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22574692625 + ... + 22574692718.

It is an arithmetic number, because the mean of its divisors is an integer number (541792624128).

Almost surely, 2^{2122021111121} is an apocalyptic number.

It is an amenable number.

2122021111121 is a deficient number, since it is larger than the sum of its proper divisors (45149385391).

2122021111121 is an equidigital number, since it uses as much as digits as its factorization.

2122021111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45149385390.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2122021111121 its reverse (1211111202212), we get a palindrome (3333132313333).

The spelling of 2122021111121 in words is "two trillion, one hundred twenty-two billion, twenty-one million, one hundred eleven thousand, one hundred twenty-one".