10221122281 has 2 divisors, whose sum is σ = 10221122282. Its totient is φ = 10221122280.

The previous prime is 10221122209. The next prime is 10221122287. The reversal of 10221122281 is 18222112201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8975667600 + 1245454681 = 94740^2 + 35291^2 .

It is a cyclic number.

It is not a de Polignac number, because 10221122281 - 2³¹ = 8073638633 is a prime.

It is a super-2 number, since 2×10221122281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10221122287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110561140 + 5110561141.

It is an arithmetic number, because the mean of its divisors is an integer number (5110561141).

Almost surely, 2^10221122281 is an apocalyptic number.

It is an amenable number.

10221122281 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221122281 is an equidigital number, since it uses as much as digits as its factorization.

10221122281 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 22.

Adding to 10221122281 its reverse (18222112201), we get a palindrome (28443234482).

The spelling of 10221122281 in words is "ten billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred eighty-one".