42103421309 has 2 divisors, whose sum is σ = 42103421310. Its totient is φ = 42103421308.

The previous prime is 42103421293. The next prime is 42103421323. The reversal of 42103421309 is 90312430124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40832284900 + 1271136409 = 202070^2 + 35653^2 .

It is a cyclic number.

It is not a de Polignac number, because 42103421309 - 2⁴ = 42103421293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42103421209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21051710654 + 21051710655.

It is an arithmetic number, because the mean of its divisors is an integer number (21051710655).

Almost surely, 2^42103421309 is an apocalyptic number.

It is an amenable number.

42103421309 is a deficient number, since it is larger than the sum of its proper divisors (1).

42103421309 is an equidigital number, since it uses as much as digits as its factorization.

42103421309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 42103421309 in words is "forty-two billion, one hundred three million, four hundred twenty-one thousand, three hundred nine".