211222121120281 has 2 divisors, whose sum is σ = 211222121120282. Its totient is φ = 211222121120280.

The previous prime is 211222121120273. The next prime is 211222121120333. The reversal of 211222121120281 is 182021121222112.

211222121120281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187238172250000 + 23983948870281 = 13683500^2 + 4897341^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222121120281 - 2³ = 211222121120273 is a prime.

It is a super-2 number, since 2×211222121120281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211222121120081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611060560140 + 105611060560141.

It is an arithmetic number, because the mean of its divisors is an integer number (105611060560141).

Almost surely, 2^{211222121120281} is an apocalyptic number.

It is an amenable number.

211222121120281 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222121120281 is an equidigital number, since it uses as much as digits as its factorization.

211222121120281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 28.

Adding to 211222121120281 its reverse (182021121222112), we get a palindrome (393243242342393).

The spelling of 211222121120281 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty thousand, two hundred eighty-one".