222221120202221 has 32 divisors (see below), whose sum is σ = 257898196159488. Its totient is φ = 187536172095360.

The previous prime is 222221120202181. The next prime is 222221120202229. The reversal of 222221120202221 is 122202021122222.

It is a cyclic number.

It is not a de Polignac number, because 222221120202221 - 2¹⁴ = 222221120185837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221120202229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1218313190 + ... + 1218495576.

It is an arithmetic number, because the mean of its divisors is an integer number (8059318629984).

Almost surely, 2^{222221120202221} is an apocalyptic number.

It is an amenable number.

222221120202221 is a deficient number, since it is larger than the sum of its proper divisors (35677075957267).

222221120202221 is a wasteful number, since it uses less digits than its factorization.

222221120202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186641.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 222221120202221 its reverse (122202021122222), we get a palindrome (344423141324443).

The spelling of 222221120202221 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty million, two hundred two thousand, two hundred twenty-one".