201221312267 has 2 divisors, whose sum is σ = 201221312268. Its totient is φ = 201221312266.

The previous prime is 201221312153. The next prime is 201221312291. The reversal of 201221312267 is 762213122102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201221312267 - 2²⁸ = 200952876811 is a prime.

It is not a weakly prime, because it can be changed into another prime (201221312297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610656133 + 100610656134.

It is an arithmetic number, because the mean of its divisors is an integer number (100610656134).

Almost surely, 2^201221312267 is an apocalyptic number.

201221312267 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221312267 is an equidigital number, since it uses as much as digits as its factorization.

201221312267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 201221312267 its reverse (762213122102), we get a palindrome (963434434369).

The spelling of 201221312267 in words is "two hundred one billion, two hundred twenty-one million, three hundred twelve thousand, two hundred sixty-seven".