10020421297 has 2 divisors, whose sum is σ = 10020421298. Its totient is φ = 10020421296.

The previous prime is 10020421277. The next prime is 10020421357. The reversal of 10020421297 is 79212402001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5897625616 + 4122795681 = 76796^2 + 64209^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020421297 - 2¹¹ = 10020419249 is a prime.

It is not a weakly prime, because it can be changed into another prime (10020421277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010210648 + 5010210649.

It is an arithmetic number, because the mean of its divisors is an integer number (5010210649).

Almost surely, 2^10020421297 is an apocalyptic number.

It is an amenable number.

10020421297 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020421297 is an equidigital number, since it uses as much as digits as its factorization.

10020421297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 10020421297 its reverse (79212402001), we get a palindrome (89232823298).

The spelling of 10020421297 in words is "ten billion, twenty million, four hundred twenty-one thousand, two hundred ninety-seven".