10022221081 has 2 divisors, whose sum is σ = 10022221082. Its totient is φ = 10022221080.

The previous prime is 10022221073. The next prime is 10022221091. The reversal of 10022221081 is 18012222001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6648934681 + 3373286400 = 81541^2 + 58080^2 .

It is a cyclic number.

It is not a de Polignac number, because 10022221081 - 2³ = 10022221073 is a prime.

It is a super-2 number, since 2×10022221081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10022221091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5011110540 + 5011110541.

It is an arithmetic number, because the mean of its divisors is an integer number (5011110541).

Almost surely, 2^10022221081 is an apocalyptic number.

It is an amenable number.

10022221081 is a deficient number, since it is larger than the sum of its proper divisors (1).

10022221081 is an equidigital number, since it uses as much as digits as its factorization.

10022221081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 10022221081 its reverse (18012222001), we get a palindrome (28034443082).

The spelling of 10022221081 in words is "ten billion, twenty-two million, two hundred twenty-one thousand, eighty-one".