222121340 has 24 divisors (see below), whose sum is σ = 533091552. Its totient is φ = 76155840.

The previous prime is 222121309. The next prime is 222121351. The reversal of 222121340 is 43121222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793151 + ... + 793430.

It is an arithmetic number, because the mean of its divisors is an integer number (22212148).

Almost surely, 2^222121340 is an apocalyptic number.

222121340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121340 is an abundant number, since it is smaller than the sum of its proper divisors (310970212).

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

222121340 is a wasteful number, since it uses less digits than its factorization.

222121340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586597 (or 1586595 counting only the distinct ones).

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

The square root of 222121340 is about 14903.7357732885. The cubic root of 222121340 is about 605.6151928222.

Adding to 222121340 its reverse (43121222), we get a palindrome (265242562).

The spelling of 222121340 in words is "two hundred twenty-two million, one hundred twenty-one thousand, three hundred forty".