22511121 has 8 divisors (see below), whose sum is σ = 30110784. Its totient is φ = 14959440.

The previous prime is 22511119. The next prime is 22511123. The reversal of 22511121 is 12111522.

It is an interprime number because it is at equal distance from previous prime (22511119) and next prime (22511123).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22511121 - 2¹ = 22511119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22511121.

It is not an unprimeable number, because it can be changed into a prime (22511123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10885 + ... + 12786.

It is an arithmetic number, because the mean of its divisors is an integer number (3763848).

Almost surely, 2^22511121 is an apocalyptic number.

It is an amenable number.

22511121 is a deficient number, since it is larger than the sum of its proper divisors (7599663).

22511121 is a wasteful number, since it uses less digits than its factorization.

22511121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23991.

The product of its digits is 40, while the sum is 15.

The square root of 22511121 is about 4744.5886017652. The cubic root of 22511121 is about 282.3573132774.

Adding to 22511121 its reverse (12111522), we get a palindrome (34622643).

The spelling of 22511121 in words is "twenty-two million, five hundred eleven thousand, one hundred twenty-one".