10020211997 has 2 divisors, whose sum is σ = 10020211998. Its totient is φ = 10020211996.

The previous prime is 10020211991. The next prime is 10020212053. The reversal of 10020211997 is 79911202001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7081054201 + 2939157796 = 84149^2 + 54214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10020211997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10020211991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010105998 + 5010105999.

It is an arithmetic number, because the mean of its divisors is an integer number (5010105999).

Almost surely, 2^10020211997 is an apocalyptic number.

It is an amenable number.

10020211997 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020211997 is an equidigital number, since it uses as much as digits as its factorization.

10020211997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 32.

Adding to 10020211997 its reverse (79911202001), we get a palindrome (89931413998).

The spelling of 10020211997 in words is "ten billion, twenty million, two hundred eleven thousand, nine hundred ninety-seven".