222070721 has 2 divisors, whose sum is σ = 222070722. Its totient is φ = 222070720.

The previous prime is 222070703. The next prime is 222070729. The reversal of 222070721 is 127070222.

222070721 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., 218596225 + 3474496 = 14785^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 222070721 - 2⁶ = 222070657 is a prime.

It is not a weakly prime, because it can be changed into another prime (222070729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111035360 + 111035361.

It is an arithmetic number, because the mean of its divisors is an integer number (111035361).

Almost surely, 2^222070721 is an apocalyptic number.

It is an amenable number.

222070721 is a deficient number, since it is larger than the sum of its proper divisors (1).

222070721 is an equidigital number, since it uses as much as digits as its factorization.

222070721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 222070721 is about 14902.0374781437. The cubic root of 222070721 is about 605.5691849894.

The spelling of 222070721 in words is "two hundred twenty-two million, seventy thousand, seven hundred twenty-one".