2220211121 has 4 divisors (see below), whose sum is σ = 2221398372. Its totient is φ = 2219023872.

The previous prime is 2220211117. The next prime is 2220211139. The reversal of 2220211121 is 1211120222.

2220211121 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.

It can be written as a sum of positive squares in 2 ways, for example, as 287641600 + 1932569521 = 16960^2 + 43961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220211121 - 2² = 2220211117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220211096 and 2220211105.

It is not an unprimeable number, because it can be changed into a prime (2220211111) 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, 590816 + ... + 594561.

It is an arithmetic number, because the mean of its divisors is an integer number (555349593).

Almost surely, 2^2220211121 is an apocalyptic number.

It is an amenable number.

2220211121 is a deficient number, since it is larger than the sum of its proper divisors (1187251).

2220211121 is a wasteful number, since it uses less digits than its factorization.

2220211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187250.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2220211121 is about 47119.1163011362. The cubic root of 2220211121 is about 1304.5621018215.

Adding to 2220211121 its reverse (1211120222), we get a palindrome (3431331343).

The spelling of 2220211121 in words is "two billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty-one".