221422106 has 4 divisors (see below), whose sum is σ = 332133162. Its totient is φ = 110711052.

The previous prime is 221422079. The next prime is 221422111. The reversal of 221422106 is 601224122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601224122 = 2 ⋅300612061.

It can be written as a sum of positive squares in only one way, i.e., 192959881 + 28462225 = 13891^2 + 5335^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55355525 + ... + 55355528.

Almost surely, 2^221422106 is an apocalyptic number.

221422106 is a deficient number, since it is larger than the sum of its proper divisors (110711056).

221422106 is a wasteful number, since it uses less digits than its factorization.

221422106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110711055.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 221422106 is about 14880.2589359191. The cubic root of 221422106 is about 604.9790362246.

Adding to 221422106 its reverse (601224122), we get a palindrome (822646228).

The spelling of 221422106 in words is "two hundred twenty-one million, four hundred twenty-two thousand, one hundred six".