222021091 has 8 divisors (see below), whose sum is σ = 229296960. Its totient is φ = 214851648.

The previous prime is 222021077. The next prime is 222021103. The reversal of 222021091 is 190120222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222021091 - 2⁷ = 222020963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222021011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22356 + ... + 30721.

It is an arithmetic number, because the mean of its divisors is an integer number (28662120).

Almost surely, 2^222021091 is an apocalyptic number.

222021091 is a deficient number, since it is larger than the sum of its proper divisors (7275869).

222021091 is an equidigital number, since it uses as much as digits as its factorization.

222021091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53213.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 222021091 is about 14900.3721765599. The cubic root of 222021091 is about 605.5240692747.

The spelling of 222021091 in words is "two hundred twenty-two million, twenty-one thousand, ninety-one".