42011321111 has 4 divisors (see below), whose sum is σ = 44482575312. Its totient is φ = 39540066912.

The previous prime is 42011321087. The next prime is 42011321113. The reversal of 42011321111 is 11112311024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42011321111 is a prime.

It is a super-2 number, since 2×42011321111² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 2471254183 = 42011321111 / (4 + 2 + 0 + 1 + 1 + 3 + 2 + 1 + 1 + 1 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42011321111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42011321113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1235627075 + ... + 1235627108.

It is an arithmetic number, because the mean of its divisors is an integer number (11120643828).

Almost surely, 2^42011321111 is an apocalyptic number.

42011321111 is a deficient number, since it is larger than the sum of its proper divisors (2471254201).

42011321111 is a wasteful number, since it uses less digits than its factorization.

42011321111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471254200.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 42011321111 its reverse (11112311024), we get a palindrome (53123632135).

The spelling of 42011321111 in words is "forty-two billion, eleven million, three hundred twenty-one thousand, one hundred eleven".