222121111100201 has 2 divisors, whose sum is σ = 222121111100202. Its totient is φ = 222121111100200.

The previous prime is 222121111100197. The next prime is 222121111100257. The reversal of 222121111100201 is 102001111121222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121999093902400 + 100122017197801 = 11045320^2 + 10006099^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121111100201 - 2² = 222121111100197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222121111100201.

It is not a weakly prime, because it can be changed into another prime (222121111100501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060555550100 + 111060555550101.

It is an arithmetic number, because the mean of its divisors is an integer number (111060555550101).

Almost surely, 2^{222121111100201} is an apocalyptic number.

It is an amenable number.

222121111100201 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121111100201 is an equidigital number, since it uses as much as digits as its factorization.

222121111100201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 222121111100201 its reverse (102001111121222), we get a palindrome (324122222221423).

The spelling of 222121111100201 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred eleven million, one hundred thousand, two hundred one".