222110212201261 has 2 divisors, whose sum is σ = 222110212201262. Its totient is φ = 222110212201260.

The previous prime is 222110212201259. The next prime is 222110212201277. The reversal of 222110212201261 is 162102212011222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167851976292900 + 54258235908361 = 12955770^2 + 7366019^2 .

It is a cyclic number.

It is not a de Polignac number, because 222110212201261 - 2¹ = 222110212201259 is a prime.

Together with 222110212201259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222110212901261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111055106100630 + 111055106100631.

It is an arithmetic number, because the mean of its divisors is an integer number (111055106100631).

Almost surely, 2^{222110212201261} is an apocalyptic number.

It is an amenable number.

222110212201261 is a deficient number, since it is larger than the sum of its proper divisors (1).

222110212201261 is an equidigital number, since it uses as much as digits as its factorization.

222110212201261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 222110212201261 its reverse (162102212011222), we get a palindrome (384212424212483).

The spelling of 222110212201261 in words is "two hundred twenty-two trillion, one hundred ten billion, two hundred twelve million, two hundred one thousand, two hundred sixty-one".