222221212022221 has 8 divisors (see below), whose sum is σ = 222405353985024. Its totient is φ = 222037126374000.

The previous prime is 222221212022209. The next prime is 222221212022231. The reversal of 222221212022221 is 122220212122222.

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 222221212022221 - 2⁵ = 222221212022189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221212022231) 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, 6181405 + ... + 21969346.

It is an arithmetic number, because the mean of its divisors is an integer number (27800669248128).

Almost surely, 2^{222221212022221} is an apocalyptic number.

It is an amenable number.

222221212022221 is a deficient number, since it is larger than the sum of its proper divisors (184141962803).

222221212022221 is a wasteful number, since it uses less digits than its factorization.

222221212022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28157291.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 222221212022221 its reverse (122220212122222), we get a palindrome (344441424144443).

The spelling of 222221212022221 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred twelve million, twenty-two thousand, two hundred twenty-one".