10020021197 has 2 divisors, whose sum is σ = 10020021198. Its totient is φ = 10020021196.

The previous prime is 10020021191. The next prime is 10020021211. The reversal of 10020021197 is 79112002001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5888874121 + 4131147076 = 76739^2 + 64274^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020021197 - 2⁴ = 10020021181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10020021191) 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, 5010010598 + 5010010599.

It is an arithmetic number, because the mean of its divisors is an integer number (5010010599).

Almost surely, 2^10020021197 is an apocalyptic number.

It is an amenable number.

10020021197 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020021197 is an equidigital number, since it uses as much as digits as its factorization.

10020021197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

Adding to 10020021197 its reverse (79112002001), we get a palindrome (89132023198).

The spelling of 10020021197 in words is "ten billion, twenty million, twenty-one thousand, one hundred ninety-seven".