42221001 has 8 divisors (see below), whose sum is σ = 56423520. Its totient is φ = 28082912.

The previous prime is 42220963. The next prime is 42221027. The reversal of 42221001 is 10012224.

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 42221001 - 2¹⁸ = 41958857 is a prime.

It is a super-2 number, since 2×42221001² = 3565225850884002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42221051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14556 + ... + 17213.

It is an arithmetic number, because the mean of its divisors is an integer number (7052940).

Almost surely, 2^42221001 is an apocalyptic number.

It is an amenable number.

42221001 is a deficient number, since it is larger than the sum of its proper divisors (14202519).

42221001 is a wasteful number, since it uses less digits than its factorization.

42221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32215.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 42221001 is about 6497.7689247926. The cubic root of 42221001 is about 348.2112850250.

Adding to 42221001 its reverse (10012224), we get a palindrome (52233225).

The spelling of 42221001 in words is "forty-two million, two hundred twenty-one thousand, one".