22011201 has 6 divisors (see below), whose sum is σ = 31793970. Its totient is φ = 14674128.

The previous prime is 22011163. The next prime is 22011211. The reversal of 22011201 is 10211022.

It can be written as a sum of positive squares in only one way, i.e., 20711601 + 1299600 = 4551^2 + 1140^2 .

It is not a de Polignac number, because 22011201 - 2¹¹ = 22009153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2445689 = 22011201 / (2 + 2 + 0 + 1 + 1 + 2 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (22011211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1222836 + ... + 1222853.

It is an arithmetic number, because the mean of its divisors is an integer number (5298995).

Almost surely, 2^22011201 is an apocalyptic number.

It is an amenable number.

22011201 is a deficient number, since it is larger than the sum of its proper divisors (9782769).

22011201 is a wasteful number, since it uses less digits than its factorization.

22011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445695 (or 2445692 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 22011201 is about 4691.6096384930. The cubic root of 22011201 is about 280.2514790012.

Adding to 22011201 its reverse (10211022), we get a palindrome (32222223).

The spelling of 22011201 in words is "twenty-two million, eleven thousand, two hundred one".