2211211012121 has 4 divisors (see below), whose sum is σ = 2211221289744. Its totient is φ = 2211200734500.

The previous prime is 2211211012111. The next prime is 2211211012181. The reversal of 2211211012121 is 1212101121122.

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 2211211012121 - 2¹⁴ = 2211210995737 is a prime.

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 2211211012121.

It is not an unprimeable number, because it can be changed into a prime (2211211012111) 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, 4809035 + ... + 5248736.

It is an arithmetic number, because the mean of its divisors is an integer number (552805322436).

Almost surely, 2^{2211211012121} is an apocalyptic number.

It is an amenable number.

2211211012121 is a deficient number, since it is larger than the sum of its proper divisors (10277623).

2211211012121 is a wasteful number, since it uses less digits than its factorization.

2211211012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10277622.

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

Adding to 2211211012121 its reverse (1212101121122), we get a palindrome (3423312133243).

The spelling of 2211211012121 in words is "two trillion, two hundred eleven billion, two hundred eleven million, twelve thousand, one hundred twenty-one".