210201221120251 has 2 divisors, whose sum is σ = 210201221120252. Its totient is φ = 210201221120250.

The previous prime is 210201221120243. The next prime is 210201221120257. The reversal of 210201221120251 is 152021122102012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210201221120251 - 2³ = 210201221120243 is a prime.

It is not a weakly prime, because it can be changed into another prime (210201221120257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105100610560125 + 105100610560126.

It is an arithmetic number, because the mean of its divisors is an integer number (105100610560126).

Almost surely, 2^{210201221120251} is an apocalyptic number.

210201221120251 is a deficient number, since it is larger than the sum of its proper divisors (1).

210201221120251 is an equidigital number, since it uses as much as digits as its factorization.

210201221120251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 210201221120251 its reverse (152021122102012), we get a palindrome (362222343222263).

The spelling of 210201221120251 in words is "two hundred ten trillion, two hundred one billion, two hundred twenty-one million, one hundred twenty thousand, two hundred fifty-one".