110221211281 has 2 divisors, whose sum is σ = 110221211282. Its totient is φ = 110221211280.

The previous prime is 110221211227. The next prime is 110221211351. The reversal of 110221211281 is 182112122011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96668759056 + 13552452225 = 310916^2 + 116415^2 .

It is a cyclic number.

It is not a de Polignac number, because 110221211281 - 2¹⁵ = 110221178513 is a prime.

It is a super-2 number, since 2×110221211281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (110221211981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55110605640 + 55110605641.

It is an arithmetic number, because the mean of its divisors is an integer number (55110605641).

Almost surely, 2^110221211281 is an apocalyptic number.

It is an amenable number.

110221211281 is a deficient number, since it is larger than the sum of its proper divisors (1).

110221211281 is an equidigital number, since it uses as much as digits as its factorization.

110221211281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 110221211281 its reverse (182112122011), we get a palindrome (292333333292).

The spelling of 110221211281 in words is "one hundred ten billion, two hundred twenty-one million, two hundred eleven thousand, two hundred eighty-one".