42221123 has 16 divisors (see below), whose sum is σ = 50651136. Its totient is φ = 34409760.

The previous prime is 42221119. The next prime is 42221143. The reversal of 42221123 is 32112224.

It is not a de Polignac number, because 42221123 - 2² = 42221119 is a prime.

It is a super-2 number, since 2×42221123² = 3565246454762258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42221143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30065 + ... + 31437.

It is an arithmetic number, because the mean of its divisors is an integer number (3165696).

Almost surely, 2^42221123 is an apocalyptic number.

42221123 is a deficient number, since it is larger than the sum of its proper divisors (8430013).

42221123 is a wasteful number, since it uses less digits than its factorization.

42221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594.

The product of its digits is 192, while the sum is 17.

The square root of 42221123 is about 6497.7783126235. The cubic root of 42221123 is about 348.2116204168.

Adding to 42221123 its reverse (32112224), we get a palindrome (74333347).

The spelling of 42221123 in words is "forty-two million, two hundred twenty-one thousand, one hundred twenty-three".