22120101 has 8 divisors (see below), whose sum is σ = 32770560. Its totient is φ = 14746716.

The previous prime is 22120099. The next prime is 22120151. The reversal of 22120101 is 10102122.

It is not a de Polignac number, because 22120101 - 2¹ = 22120099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409605 + ... + 409658.

It is an arithmetic number, because the mean of its divisors is an integer number (4096320).

Almost surely, 2^22120101 is an apocalyptic number.

It is an amenable number.

22120101 is a deficient number, since it is larger than the sum of its proper divisors (10650459).

22120101 is an equidigital number, since it uses as much as digits as its factorization.

22120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819272 (or 819266 counting only the distinct ones).

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

The square root of 22120101 is about 4703.2011439019. The cubic root of 22120101 is about 280.7128985089.

Adding to 22120101 its reverse (10102122), we get a palindrome (32222223).

The spelling of 22120101 in words is "twenty-two million, one hundred twenty thousand, one hundred one".