2222921 has 2 divisors, whose sum is σ = 2222922. Its totient is φ = 2222920.

The previous prime is 2222911. The next prime is 2222929. The reversal of 2222921 is 1292222.

2222921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 373321 = 1360^2 + 611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2222921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2222893 and 2222902.

It is not a weakly prime, because it can be changed into another prime (2222929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111460 + 1111461.

It is an arithmetic number, because the mean of its divisors is an integer number (1111461).

2^2222921 is an apocalyptic number.

It is an amenable number.

2222921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222921 is an equidigital number, since it uses as much as digits as its factorization.

2222921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 2222921 is about 1490.9463437696. The cubic root of 2222921 is about 130.5092647181.

The spelling of 2222921 in words is "two million, two hundred twenty-two thousand, nine hundred twenty-one".