42221321201 has 4 divisors (see below), whose sum is σ = 43119647232. Its totient is φ = 41322995172.

The previous prime is 42221321189. The next prime is 42221321221. The reversal of 42221321201 is 10212312224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42221321201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42221321221) 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, 449162945 + ... + 449163038.

It is an arithmetic number, because the mean of its divisors is an integer number (10779911808).

Almost surely, 2^42221321201 is an apocalyptic number.

It is an amenable number.

42221321201 is a deficient number, since it is larger than the sum of its proper divisors (898326031).

42221321201 is an equidigital number, since it uses as much as digits as its factorization.

42221321201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898326030.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 42221321201 its reverse (10212312224), we get a palindrome (52433633425).

The spelling of 42221321201 in words is "forty-two billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred one".