222123042 has 24 divisors (see below), whose sum is σ = 482826240. Its totient is φ = 73801080.

The previous prime is 222123001. The next prime is 222123043. The reversal of 222123042 is 240321222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (222123043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14242 + ... + 25437.

It is an arithmetic number, because the mean of its divisors is an integer number (20117760).

Almost surely, 2^222123042 is an apocalyptic number.

222123042 is an abundant number, since it is smaller than the sum of its proper divisors (260703198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222123042 is a wasteful number, since it uses less digits than its factorization.

222123042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39998 (or 39995 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 222123042 is about 14903.7928729569. The cubic root of 222123042 is about 605.6167396561.

Adding to 222123042 its reverse (240321222), we get a palindrome (462444264).

The spelling of 222123042 in words is "two hundred twenty-two million, one hundred twenty-three thousand, forty-two".