2211202212121 has 16 divisors (see below), whose sum is σ = 2542610251008. Its totient is φ = 1883682561600.

The previous prime is 2211202212083. The next prime is 2211202212133. The reversal of 2211202212121 is 1212122021122.

It is not a de Polignac number, because 2211202212121 - 2¹³ = 2211202203929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211202212161) 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 15 ways as a sum of consecutive naturals, for example, 3052791 + ... + 3707011.

It is an arithmetic number, because the mean of its divisors is an integer number (158913140688).

Almost surely, 2^{2211202212121} is an apocalyptic number.

It is an amenable number.

2211202212121 is a deficient number, since it is larger than the sum of its proper divisors (331408038887).

2211202212121 is a wasteful number, since it uses less digits than its factorization.

2211202212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657192.

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

Adding to 2211202212121 its reverse (1212122021122), we get a palindrome (3423324233243).

The spelling of 2211202212121 in words is "two trillion, two hundred eleven billion, two hundred two million, two hundred twelve thousand, one hundred twenty-one".