42222122 has 4 divisors (see below), whose sum is σ = 63333186. Its totient is φ = 21111060.

The previous prime is 42222119. The next prime is 42222139. The reversal of 42222122 is 22122224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34093921 + 8128201 = 5839^2 + 2851^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42222122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555529 + ... + 10555532.

Almost surely, 2^42222122 is an apocalyptic number.

42222122 is a deficient number, since it is larger than the sum of its proper divisors (21111064).

42222122 is a wasteful number, since it uses less digits than its factorization.

42222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21111063.

The product of its digits is 256, while the sum is 17.

The square root of 42222122 is about 6497.8551845975. The cubic root of 42222122 is about 348.2143667567.

Adding to 42222122 its reverse (22122224), we get a palindrome (64344346).

The spelling of 42222122 in words is "forty-two million, two hundred twenty-two thousand, one hundred twenty-two".