42212111 has 8 divisors (see below), whose sum is σ = 44588544.
Its totient is φ = 39899160.
The previous prime is 42212047. The next prime is 42212113. The reversal of 42212111 is 11121224.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 42212111 - 26 = 42212047 is a prime.
It is a Duffinian number.
It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 14501 + ... + 17166.
It is an arithmetic number, because the mean of its divisors is an integer number (5573568).
Almost surely, 242212111 is an apocalyptic number.
42212111 is a deficient number, since it is larger than the sum of its proper divisors (2376433).
42212111 is a wasteful number, since it uses less digits than its factorization.
42212111 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 31741.
The product of its digits is 32, while the sum is 14.
The square root of 42212111 is about 6497.0848078196.
The cubic root of 42212111 is about 348.1868436684.
Adding to 42212111 its reverse (11121224), we get a palindrome (53333335).
It can be divided in two parts, 4221 and 2111, that multiplied together give a triangular number (8910531 = T4221).
The spelling of 42212111 in words is "forty-two million, two hundred twelve thousand, one hundred eleven".