2202120112121 has 4 divisors (see below), whose sum is σ = 2203178317044. Its totient is φ = 2201061907200.

The previous prime is 2202120112069. The next prime is 2202120112147. The reversal of 2202120112121 is 1212110212022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 767395272121 + 1434724840000 = 876011^2 + 1197800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2202120112121 - 2³⁴ = 2184940242937 is a prime.

It is a super-2 number, since 2×2202120112121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2202120112121.

It is not an unprimeable number, because it can be changed into a prime (2202120115121) 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, 529099340 + ... + 529103501.

It is an arithmetic number, because the mean of its divisors is an integer number (550794579261).

Almost surely, 2^{2202120112121} is an apocalyptic number.

It is an amenable number.

2202120112121 is a deficient number, since it is larger than the sum of its proper divisors (1058204923).

2202120112121 is a wasteful number, since it uses less digits than its factorization.

2202120112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058204922.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2202120112121 its reverse (1212110212022), we get a palindrome (3414230324143).

Subtracting from 2202120112121 its reverse (1212110212022), we obtain a palindrome (990009900099).

The spelling of 2202120112121 in words is "two trillion, two hundred two billion, one hundred twenty million, one hundred twelve thousand, one hundred twenty-one".