42101440279 has 2 divisors, whose sum is σ = 42101440280. Its totient is φ = 42101440278.

The previous prime is 42101440273. The next prime is 42101440319. The reversal of 42101440279 is 97204410124.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42101440279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42101440273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21050720139 + 21050720140.

It is an arithmetic number, because the mean of its divisors is an integer number (21050720140).

Almost surely, 2^42101440279 is an apocalyptic number.

42101440279 is a deficient number, since it is larger than the sum of its proper divisors (1).

42101440279 is an equidigital number, since it uses as much as digits as its factorization.

42101440279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 42101440279 in words is "forty-two billion, one hundred one million, four hundred forty thousand, two hundred seventy-nine".