222121399 has 8 divisors (see below), whose sum is σ = 224840000. Its totient is φ = 219415392.

The previous prime is 222121379. The next prime is 222121423. The reversal of 222121399 is 993121222.

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

It is a cyclic number.

It is not a de Polignac number, because 222121399 - 2⁷ = 222121271 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222121399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35122 + ... + 40960.

It is an arithmetic number, because the mean of its divisors is an integer number (28105000).

Almost surely, 2^222121399 is an apocalyptic number.

222121399 is a deficient number, since it is larger than the sum of its proper divisors (2718601).

222121399 is a wasteful number, since it uses less digits than its factorization.

222121399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6297.

The product of its digits is 3888, while the sum is 31.

The square root of 222121399 is about 14903.7377526579. The cubic root of 222121399 is about 605.6152464435.

The spelling of 222121399 in words is "two hundred twenty-two million, one hundred twenty-one thousand, three hundred ninety-nine".