22143121 has 24 divisors (see below), whose sum is σ = 29970752. Its totient is φ = 15919200.

The previous prime is 22143119. The next prime is 22143127. The reversal of 22143121 is 12134122.

It is not a de Polignac number, because 22143121 - 2¹ = 22143119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22143095 and 22143104.

It is not an unprimeable number, because it can be changed into a prime (22143127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10006 + ... + 12016.

Almost surely, 2^22143121 is an apocalyptic number.

It is an amenable number.

22143121 is a deficient number, since it is larger than the sum of its proper divisors (7827631).

22143121 is a wasteful number, since it uses less digits than its factorization.

22143121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053 (or 2042 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 22143121 is about 4705.6477768741. The cubic root of 22143121 is about 280.8102424072.

Adding to 22143121 its reverse (12134122), we get a palindrome (34277243).

It can be divided in two parts, 2214 and 3121, that added together give a palindrome (5335).

The spelling of 22143121 in words is "twenty-two million, one hundred forty-three thousand, one hundred twenty-one".