42220111 has 4 divisors (see below), whose sum is σ = 44055792. Its totient is φ = 40384432.

The previous prime is 42220103. The next prime is 42220127. The reversal of 42220111 is 11102224.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42220111 - 2³ = 42220103 is a prime.

It is a super-3 number, since 3×42220111³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 42220091 and 42220100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42220151) 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, 917806 + ... + 917851.

It is an arithmetic number, because the mean of its divisors is an integer number (11013948).

Almost surely, 2^42220111 is an apocalyptic number.

42220111 is a deficient number, since it is larger than the sum of its proper divisors (1835681).

42220111 is a wasteful number, since it uses less digits than its factorization.

42220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835680.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 42220111 is about 6497.7004393862. The cubic root of 42220111 is about 348.2088382945.

Adding to 42220111 its reverse (11102224), we get a palindrome (53322335).

The spelling of 42220111 in words is "forty-two million, two hundred twenty thousand, one hundred eleven".