221091098 has 8 divisors (see below), whose sum is σ = 331759092. Its totient is φ = 110504736.

The previous prime is 221091053. The next prime is 221091127. The reversal of 221091098 is 890190122.

It is a happy number.

221091098 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 220908769 + 182329 = 14863^2 + 427^2 .

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

It is a super-2 number, since 2×221091098² = 97762547229691208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13115 + ... + 24782.

Almost surely, 2^221091098 is an apocalyptic number.

221091098 is a deficient number, since it is larger than the sum of its proper divisors (110667994).

221091098 is a wasteful number, since it uses less digits than its factorization.

221091098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40816.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 221091098 is about 14869.1323889459. The cubic root of 221091098 is about 604.6774210959.

The spelling of 221091098 in words is "two hundred twenty-one million, ninety-one thousand, ninety-eight".