10042421309 has 2 divisors, whose sum is σ = 10042421310. Its totient is φ = 10042421308.

The previous prime is 10042421293. The next prime is 10042421321. The reversal of 10042421309 is 90312424001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6867436900 + 3174984409 = 82870^2 + 56347^2 .

It is a cyclic number.

It is not a de Polignac number, because 10042421309 - 2⁴ = 10042421293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10042421359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5021210654 + 5021210655.

It is an arithmetic number, because the mean of its divisors is an integer number (5021210655).

Almost surely, 2^10042421309 is an apocalyptic number.

It is an amenable number.

10042421309 is a deficient number, since it is larger than the sum of its proper divisors (1).

10042421309 is an equidigital number, since it uses as much as digits as its factorization.

10042421309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 10042421309 in words is "ten billion, forty-two million, four hundred twenty-one thousand, three hundred nine".