222121042 has 32 divisors (see below), whose sum is σ = 396829440. Its totient is φ = 91912320.

The previous prime is 222121033. The next prime is 222121043. The reversal of 222121042 is 240121222.

222121042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (222121043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15559 + ... + 26197.

It is an arithmetic number, because the mean of its divisors is an integer number (12400920).

Almost surely, 2^222121042 is an apocalyptic number.

222121042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

222121042 is a deficient number, since it is larger than the sum of its proper divisors (174708398).

222121042 is a wasteful number, since it uses less digits than its factorization.

222121042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10738.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 222121042 is about 14903.7257757918. The cubic root of 222121042 is about 605.6149219892.

Adding to 222121042 its reverse (240121222), we get a palindrome (462242264).

The spelling of 222121042 in words is "two hundred twenty-two million, one hundred twenty-one thousand, forty-two".