42101811 has 12 divisors (see below), whose sum is σ = 60904480. Its totient is φ = 28026000.

The previous prime is 42101803. The next prime is 42101821. The reversal of 42101811 is 11810124.

It is not a de Polignac number, because 42101811 - 2³ = 42101803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42101821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3645 + ... + 9873.

Almost surely, 2^42101811 is an apocalyptic number.

42101811 is a deficient number, since it is larger than the sum of its proper divisors (18802669).

42101811 is a wasteful number, since it uses less digits than its factorization.

42101811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6986 (or 6983 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 42101811 is about 6488.5908331471. The cubic root of 42101811 is about 347.8833090723.

Adding to 42101811 its reverse (11810124), we get a palindrome (53911935).

The spelling of 42101811 in words is "forty-two million, one hundred one thousand, eight hundred eleven".