22003121 has 8 divisors (see below), whose sum is σ = 26470080. Its totient is φ = 17867088.

The previous prime is 22003103. The next prime is 22003129. The reversal of 22003121 is 12130022.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22003121 - 2¹⁴ = 21986737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22003129) 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, 82586 + ... + 82851.

It is an arithmetic number, because the mean of its divisors is an integer number (3308760).

Almost surely, 2^22003121 is an apocalyptic number.

It is an amenable number.

22003121 is a deficient number, since it is larger than the sum of its proper divisors (4466959).

22003121 is a wasteful number, since it uses less digits than its factorization.

22003121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165463.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 22003121 is about 4690.7484477426. The cubic root of 22003121 is about 280.2171826886.

Adding to 22003121 its reverse (12130022), we get a palindrome (34133143).

The spelling of 22003121 in words is "twenty-two million, three thousand, one hundred twenty-one".