201210211211281 has 2 divisors, whose sum is σ = 201210211211282. Its totient is φ = 201210211211280.

The previous prime is 201210211211183. The next prime is 201210211211377. The reversal of 201210211211281 is 182112112012102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180677712772881 + 20532498438400 = 13441641^2 + 4531280^2 .

It is a cyclic number.

It is not a de Polignac number, because 201210211211281 - 2⁹ = 201210211210769 is a prime.

It is a super-2 number, since 2×201210211211281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201210211011281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605105605640 + 100605105605641.

It is an arithmetic number, because the mean of its divisors is an integer number (100605105605641).

Almost surely, 2^{201210211211281} is an apocalyptic number.

It is an amenable number.

201210211211281 is a deficient number, since it is larger than the sum of its proper divisors (1).

201210211211281 is an equidigital number, since it uses as much as digits as its factorization.

201210211211281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 25.

Adding to 201210211211281 its reverse (182112112012102), we get a palindrome (383322323223383).

The spelling of 201210211211281 in words is "two hundred one trillion, two hundred ten billion, two hundred eleven million, two hundred eleven thousand, two hundred eighty-one".