42525122111 has 4 divisors (see below), whose sum is σ = 42525881112. Its totient is φ = 42524363112.

The previous prime is 42525122083. The next prime is 42525122117. The reversal of 42525122111 is 11122152524.

It is a happy number.

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-42525122111 is a prime.

It is a super-2 number, since 2×42525122111² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42525122117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288125 + ... + 409958.

It is an arithmetic number, because the mean of its divisors is an integer number (10631470278).

Almost surely, 2^42525122111 is an apocalyptic number.

42525122111 is a deficient number, since it is larger than the sum of its proper divisors (759001).

42525122111 is an equidigital number, since it uses as much as digits as its factorization.

42525122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759000.

The product of its digits is 1600, while the sum is 26.

Adding to 42525122111 its reverse (11122152524), we get a palindrome (53647274635).

The spelling of 42525122111 in words is "forty-two billion, five hundred twenty-five million, one hundred twenty-two thousand, one hundred eleven".