22102001 has 4 divisors (see below), whose sum is σ = 22115904. Its totient is φ = 22088100.

The previous prime is 22101979. The next prime is 22102013. The reversal of 22102001 is 10020122.

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-22102001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22102001.

It is not an unprimeable number, because it can be changed into a prime (22102051) 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, 4205 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (5528976).

Almost surely, 2^22102001 is an apocalyptic number.

It is an amenable number.

22102001 is a deficient number, since it is larger than the sum of its proper divisors (13903).

22102001 is a wasteful number, since it uses less digits than its factorization.

22102001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13902.

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

The square root of 22102001 is about 4701.2765287739. The cubic root of 22102001 is about 280.6363122111.

Adding to 22102001 its reverse (10020122), we get a palindrome (32122123).

The spelling of 22102001 in words is "twenty-two million, one hundred two thousand, one".