221424122 has 8 divisors (see below), whose sum is σ = 333371700. Its totient is φ = 110300224.

The previous prime is 221424113. The next prime is 221424127.

221424122 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 190964761 + 30459361 = 13819^2 + 5519^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 221424094 and 221424103.

It is not an unprimeable number, because it can be changed into a prime (221424127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205247 + ... + 206322.

Almost surely, 2^221424122 is an apocalyptic number.

221424122 is a deficient number, since it is larger than the sum of its proper divisors (111947578).

221424122 is a wasteful number, since it uses less digits than its factorization.

221424122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411840.

The product of its digits is 512, while the sum is 20.

The square root of 221424122 is about 14880.3266765216. The cubic root of 221424122 is about 604.9808722865.

The spelling of 221424122 in words is "two hundred twenty-one million, four hundred twenty-four thousand, one hundred twenty-two".