2220223121 has 2 divisors, whose sum is σ = 2220223122. Its totient is φ = 2220223120.

The previous prime is 2220223043. The next prime is 2220223123. The reversal of 2220223121 is 1213220222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1275275521 + 944947600 = 35711^2 + 30740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2220223121 is a prime.

Together with 2220223123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2220223121.

It is not a weakly prime, because it can be changed into another prime (2220223123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110111560 + 1110111561.

It is an arithmetic number, because the mean of its divisors is an integer number (1110111561).

Almost surely, 2^2220223121 is an apocalyptic number.

It is an amenable number.

2220223121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220223121 is an equidigital number, since it uses as much as digits as its factorization.

2220223121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2220223121 is about 47119.2436378174. The cubic root of 2220223121 is about 1304.5644521561.

Adding to 2220223121 its reverse (1213220222), we get a palindrome (3433443343).

The spelling of 2220223121 in words is "two billion, two hundred twenty million, two hundred twenty-three thousand, one hundred twenty-one".