42212123 has 4 divisors (see below), whose sum is σ = 42225120. Its totient is φ = 42199128.

The previous prime is 42212113. The next prime is 42212143. The reversal of 42212123 is 32121224.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42212123 - 2¹² = 42208027 is a prime.

It is a super-3 number, since 3×42212123³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42212113) 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 3 ways as a sum of consecutive naturals, for example, 3086 + ... + 9692.

It is an arithmetic number, because the mean of its divisors is an integer number (10556280).

Almost surely, 2^42212123 is an apocalyptic number.

42212123 is a deficient number, since it is larger than the sum of its proper divisors (12997).

42212123 is an equidigital number, since it uses as much as digits as its factorization.

42212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12996.

The product of its digits is 192, while the sum is 17.

The square root of 42212123 is about 6497.0857313106. The cubic root of 42212123 is about 348.1868766624.

Adding to 42212123 its reverse (32121224), we get a palindrome (74333347).

The spelling of 42212123 in words is "forty-two million, two hundred twelve thousand, one hundred twenty-three".