22120001 has 4 divisors (see below), whose sum is σ = 22130004. Its totient is φ = 22110000.

The previous prime is 22119989. The next prime is 22120031. The reversal of 22120001 is 10002122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6635776 + 15484225 = 2576^2 + 3935^2 .

It is a cyclic number.

It is not a de Polignac number, because 22120001 - 2¹⁰ = 22118977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22120031) 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, 50 + ... + 6651.

It is an arithmetic number, because the mean of its divisors is an integer number (5532501).

Almost surely, 2^22120001 is an apocalyptic number.

It is an amenable number.

22120001 is a deficient number, since it is larger than the sum of its proper divisors (10003).

22120001 is an equidigital number, since it uses as much as digits as its factorization.

22120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10002.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 22120001 is about 4703.1905128328. The cubic root of 22120001 is about 280.7124754950.

Adding to 22120001 its reverse (10002122), we get a palindrome (32122123).

The spelling of 22120001 in words is "twenty-two million, one hundred twenty thousand, one".