221122401 has 8 divisors (see below), whose sum is σ = 295100160. Its totient is φ = 147279792.

The previous prime is 221122387. The next prime is 221122403. The reversal of 221122401 is 104221122.

221122401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 221122401 - 2⁷ = 221122273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221122403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29905 + ... + 36558.

It is an arithmetic number, because the mean of its divisors is an integer number (36887520).

Almost surely, 2^221122401 is an apocalyptic number.

It is an amenable number.

221122401 is a deficient number, since it is larger than the sum of its proper divisors (73977759).

221122401 is a wasteful number, since it uses less digits than its factorization.

221122401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67575.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 221122401 is about 14870.1849685873. The cubic root of 221122401 is about 604.7059573331.

Adding to 221122401 its reverse (104221122), we get a palindrome (325343523).

The spelling of 221122401 in words is "two hundred twenty-one million, one hundred twenty-two thousand, four hundred one".