10022221997 has 2 divisors, whose sum is σ = 10022221998. Its totient is φ = 10022221996.

The previous prime is 10022221961. The next prime is 10022222051. The reversal of 10022221997 is 79912222001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9884535241 + 137686756 = 99421^2 + 11734^2 .

It is a cyclic number.

It is not a de Polignac number, because 10022221997 - 2¹² = 10022217901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10022221927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5011110998 + 5011110999.

It is an arithmetic number, because the mean of its divisors is an integer number (5011110999).

Almost surely, 2^10022221997 is an apocalyptic number.

It is an amenable number.

10022221997 is a deficient number, since it is larger than the sum of its proper divisors (1).

10022221997 is an equidigital number, since it uses as much as digits as its factorization.

10022221997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

Adding to 10022221997 its reverse (79912222001), we get a palindrome (89934443998).

The spelling of 10022221997 in words is "ten billion, twenty-two million, two hundred twenty-one thousand, nine hundred ninety-seven".