2220211021121 has 4 divisors (see below), whose sum is σ = 2241766468032. Its totient is φ = 2198655574212.

The previous prime is 2220211021111. The next prime is 2220211021139. The reversal of 2220211021121 is 1211201120222.

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 2220211021121 - 2³⁰ = 2219137279297 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 2220211021121.

It is not an unprimeable number, because it can be changed into a prime (2220211021111) 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, 10777723301 + ... + 10777723506.

It is an arithmetic number, because the mean of its divisors is an integer number (560441617008).

Almost surely, 2^{2220211021121} is an apocalyptic number.

It is an amenable number.

2220211021121 is a deficient number, since it is larger than the sum of its proper divisors (21555446911).

2220211021121 is a wasteful number, since it uses less digits than its factorization.

2220211021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21555446910.

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

Adding to 2220211021121 its reverse (1211201120222), we get a palindrome (3431412141343).

The spelling of 2220211021121 in words is "two trillion, two hundred twenty billion, two hundred eleven million, twenty-one thousand, one hundred twenty-one".