22135121 has 4 divisors (see below), whose sum is σ = 22675044. Its totient is φ = 21595200.

The previous prime is 22135103. The next prime is 22135163. The reversal of 22135121 is 12153122.

It is a happy number.

22135121 is nontrivially palindromic in base 16.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8526400 + 13608721 = 2920^2 + 3689^2 .

It is a cyclic number.

It is not a de Polignac number, because 22135121 - 2¹⁰ = 22134097 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 22135121.

It is not an unprimeable number, because it can be changed into a prime (22335121) 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, 269900 + ... + 269981.

It is an arithmetic number, because the mean of its divisors is an integer number (5668761).

Almost surely, 2^22135121 is an apocalyptic number.

It is an amenable number.

22135121 is a deficient number, since it is larger than the sum of its proper divisors (539923).

22135121 is an equidigital number, since it uses as much as digits as its factorization.

22135121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539922.

The product of its digits is 120, while the sum is 17.

The square root of 22135121 is about 4704.7976577107. The cubic root of 22135121 is about 280.7764207290.

Adding to 22135121 its reverse (12153122), we get a palindrome (34288243).

The spelling of 22135121 in words is "twenty-two million, one hundred thirty-five thousand, one hundred twenty-one".