42222101 has 4 divisors (see below), whose sum is σ = 44705772. Its totient is φ = 39738432.

The previous prime is 42222091. The next prime is 42222107. The reversal of 42222101 is 10122224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29441476 + 12780625 = 5426^2 + 3575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42222101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42222107) 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, 1241810 + ... + 1241843.

It is an arithmetic number, because the mean of its divisors is an integer number (11176443).

Almost surely, 2^42222101 is an apocalyptic number.

It is an amenable number.

42222101 is a deficient number, since it is larger than the sum of its proper divisors (2483671).

42222101 is a wasteful number, since it uses less digits than its factorization.

42222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483670.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 42222101 is about 6497.8535686794. The cubic root of 42222101 is about 348.2143090263.

Adding to 42222101 its reverse (10122224), we get a palindrome (52344325).

The spelling of 42222101 in words is "forty-two million, two hundred twenty-two thousand, one hundred one".