222200022221 has 4 divisors (see below), whose sum is σ = 222229819200. Its totient is φ = 222170225244.

The previous prime is 222200022203. The next prime is 222200022223. The reversal of 222200022221 is 122220002222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222200022221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 222200022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222200022223) 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, 14887301 + ... + 14902218.

It is an arithmetic number, because the mean of its divisors is an integer number (55557454800).

Almost surely, 2^222200022221 is an apocalyptic number.

It is an amenable number.

222200022221 is a deficient number, since it is larger than the sum of its proper divisors (29796979).

222200022221 is an equidigital number, since it uses as much as digits as its factorization.

222200022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29796978.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 222200022221 its reverse (122220002222), we get a palindrome (344420024443).

The spelling of 222200022221 in words is "two hundred twenty-two billion, two hundred million, twenty-two thousand, two hundred twenty-one".