42120530911 has 2 divisors, whose sum is σ = 42120530912. Its totient is φ = 42120530910.

The previous prime is 42120530891. The next prime is 42120530951. The reversal of 42120530911 is 11903502124.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42120530911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42120530911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42120530951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060265455 + 21060265456.

It is an arithmetic number, because the mean of its divisors is an integer number (21060265456).

Almost surely, 2^42120530911 is an apocalyptic number.

42120530911 is a deficient number, since it is larger than the sum of its proper divisors (1).

42120530911 is an equidigital number, since it uses as much as digits as its factorization.

42120530911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 42120530911 in words is "forty-two billion, one hundred twenty million, five hundred thirty thousand, nine hundred eleven".