2120221122121 has 4 divisors (see below), whose sum is σ = 2132917057152. Its totient is φ = 2107525187092.

The previous prime is 2120221122083. The next prime is 2120221122143. The reversal of 2120221122121 is 1212211220212.

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 2120221122121 - 2²⁷ = 2120086904393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120221122221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6347967265 + ... + 6347967598.

It is an arithmetic number, because the mean of its divisors is an integer number (533229264288).

Almost surely, 2^{2120221122121} is an apocalyptic number.

It is an amenable number.

2120221122121 is a deficient number, since it is larger than the sum of its proper divisors (12695935031).

2120221122121 is a wasteful number, since it uses less digits than its factorization.

2120221122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12695935030.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2120221122121 its reverse (1212211220212), we get a palindrome (3332432342333).

The spelling of 2120221122121 in words is "two trillion, one hundred twenty billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".