222121378 has 8 divisors (see below), whose sum is σ = 333365760. Its totient is φ = 110999460.

The previous prime is 222121369. The next prime is 222121379. The reversal of 222121378 is 873121222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (222121379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25938 + ... + 33421.

It is an arithmetic number, because the mean of its divisors is an integer number (41670720).

Almost surely, 2^222121378 is an apocalyptic number.

222121378 is a deficient number, since it is larger than the sum of its proper divisors (111244382).

222121378 is a wasteful number, since it uses less digits than its factorization.

222121378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61232.

The product of its digits is 2688, while the sum is 28.

The square root of 222121378 is about 14903.7370481366. The cubic root of 222121378 is about 605.6152273580.

The spelling of 222121378 in words is "two hundred twenty-two million, one hundred twenty-one thousand, three hundred seventy-eight".