222621121 has 2 divisors, whose sum is σ = 222621122. Its totient is φ = 222621120.

The previous prime is 222621109. The next prime is 222621143. The reversal of 222621121 is 121126222.

222621121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193071025 + 29550096 = 13895^2 + 5436^2 .

It is a cyclic number.

It is not a de Polignac number, because 222621121 - 2⁵ = 222621089 is a prime.

It is not a weakly prime, because it can be changed into another prime (222621151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111310560 + 111310561.

It is an arithmetic number, because the mean of its divisors is an integer number (111310561).

Almost surely, 2^222621121 is an apocalyptic number.

It is an amenable number.

222621121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222621121 is an equidigital number, since it uses as much as digits as its factorization.

222621121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 222621121 is about 14920.4933229434. The cubic root of 222621121 is about 606.0690712297.

Adding to 222621121 its reverse (121126222), we get a palindrome (343747343).

The spelling of 222621121 in words is "two hundred twenty-two million, six hundred twenty-one thousand, one hundred twenty-one".