221100022 has 32 divisors (see below), whose sum is σ = 396264960. Its totient is φ = 91189920.

The previous prime is 221099999. The next prime is 221100037. The reversal of 221100022 is 220001122.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 221099981 and 221100008.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10323 + ... + 23425.

It is an arithmetic number, because the mean of its divisors is an integer number (12383280).

Almost surely, 2^221100022 is an apocalyptic number.

221100022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221100022 is a deficient number, since it is larger than the sum of its proper divisors (175164938).

221100022 is a wasteful number, since it uses less digits than its factorization.

221100022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13188.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 221100022 is about 14869.4324706762. The cubic root of 221100022 is about 604.6855566092.

Adding to 221100022 its reverse (220001122), we get a palindrome (441101144).

The spelling of 221100022 in words is "two hundred twenty-one million, one hundred thousand, twenty-two".