2211222220121 has 4 divisors (see below), whose sum is σ = 2307362316672. Its totient is φ = 2115082123572.

The previous prime is 2211222220099. The next prime is 2211222220127. The reversal of 2211222220121 is 1210222221122.

2211222220121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-2211222220121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211222220093 and 2211222220102.

It is not an unprimeable number, because it can be changed into a prime (2211222220127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48070048241 + ... + 48070048286.

It is an arithmetic number, because the mean of its divisors is an integer number (576840579168).

Almost surely, 2^{2211222220121} is an apocalyptic number.

It is an amenable number.

2211222220121 is a deficient number, since it is larger than the sum of its proper divisors (96140096551).

2211222220121 is an equidigital number, since it uses as much as digits as its factorization.

2211222220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96140096550.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2211222220121 its reverse (1210222221122), we get a palindrome (3421444441243).

The spelling of 2211222220121 in words is "two trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".