22001011 has 4 divisors (see below), whose sum is σ = 22019272. Its totient is φ = 21982752.

The previous prime is 22000963. The next prime is 22001033. The reversal of 22001011 is 11010022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22001011 - 2¹³ = 21992819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22000985 and 22001003.

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 3 ways as a sum of consecutive naturals, for example, 7185 + ... + 9778.

It is an arithmetic number, because the mean of its divisors is an integer number (5504818).

Almost surely, 2^22001011 is an apocalyptic number.

22001011 is a deficient number, since it is larger than the sum of its proper divisors (18261).

22001011 is a wasteful number, since it uses less digits than its factorization.

22001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18260.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 22001011 is about 4690.5235315474. The cubic root of 22001011 is about 280.2082252146.

Adding to 22001011 its reverse (11010022), we get a palindrome (33011033).

The spelling of 22001011 in words is "twenty-two million, one thousand, eleven".