22001001 has 8 divisors (see below), whose sum is σ = 32001504. Its totient is φ = 13333920.

The previous prime is 22000963. The next prime is 22001033. The reversal of 22001001 is 10010022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22001001 - 2¹⁰ = 21999977 is a prime.

22001001 is a modest number, since divided by 1001 gives 22 as remainder.

It is not an unprimeable number, because it can be changed into a prime (22001071) 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, 333316 + ... + 333381.

It is an arithmetic number, because the mean of its divisors is an integer number (4000188).

Almost surely, 2^22001001 is an apocalyptic number.

It is an amenable number.

22001001 is a deficient number, since it is larger than the sum of its proper divisors (10000503).

22001001 is a wasteful number, since it uses less digits than its factorization.

22001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666711.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 22001001 is about 4690.5224655682. The cubic root of 22001001 is about 280.2081827607.

Adding to 22001001 its reverse (10010022), we get a palindrome (32011023).

The spelling of 22001001 in words is "twenty-two million, one thousand, one".