10042421321 has 2 divisors, whose sum is σ = 10042421322. Its totient is φ = 10042421320.

The previous prime is 10042421309. The next prime is 10042421353. The reversal of 10042421321 is 12312424001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10015005625 + 27415696 = 100075^2 + 5236^2 .

It is a cyclic number.

It is not a de Polignac number, because 10042421321 - 2¹⁴ = 10042404937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10042421293 and 10042421302.

It is not a weakly prime, because it can be changed into another prime (10042424321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5021210660 + 5021210661.

It is an arithmetic number, because the mean of its divisors is an integer number (5021210661).

Almost surely, 2^10042421321 is an apocalyptic number.

It is an amenable number.

10042421321 is a deficient number, since it is larger than the sum of its proper divisors (1).

10042421321 is an equidigital number, since it uses as much as digits as its factorization.

10042421321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 10042421321 its reverse (12312424001), we get a palindrome (22354845322).

The spelling of 10042421321 in words is "ten billion, forty-two million, four hundred twenty-one thousand, three hundred twenty-one".