212222121120281 has 2 divisors, whose sum is σ = 212222121120282. Its totient is φ = 212222121120280.

The previous prime is 212222121120259. The next prime is 212222121120341. The reversal of 212222121120281 is 182021121222212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134937961038400 + 77284160081881 = 11616280^2 + 8791141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212222121120281 is a prime.

It is a super-2 number, since 2×212222121120281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212222621120281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111060560140 + 106111060560141.

It is an arithmetic number, because the mean of its divisors is an integer number (106111060560141).

Almost surely, 2^{212222121120281} is an apocalyptic number.

It is an amenable number.

212222121120281 is a deficient number, since it is larger than the sum of its proper divisors (1).

212222121120281 is an equidigital number, since it uses as much as digits as its factorization.

212222121120281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 29.

Adding to 212222121120281 its reverse (182021121222212), we get a palindrome (394243242342493).

The spelling of 212222121120281 in words is "two hundred twelve trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty thousand, two hundred eighty-one".