22320121 has 4 divisors (see below), whose sum is σ = 22330000. Its totient is φ = 22310244.

The previous prime is 22320101. The next prime is 22320127. The reversal of 22320121 is 12102322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12102322 = 2 ⋅6051161.

It is a cyclic number.

It is not a de Polignac number, because 22320121 - 2⁷ = 22319993 is a prime.

It is a super-3 number, since 3×22320121³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (22320127) 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, 310 + ... + 6688.

It is an arithmetic number, because the mean of its divisors is an integer number (5582500).

Almost surely, 2^22320121 is an apocalyptic number.

It is an amenable number.

22320121 is a deficient number, since it is larger than the sum of its proper divisors (9879).

22320121 is an equidigital number, since it uses as much as digits as its factorization.

22320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9878.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22320121 is about 4724.4175302359. The cubic root of 22320121 is about 281.5564721119.

Adding to 22320121 its reverse (12102322), we get a palindrome (34422443).

The spelling of 22320121 in words is "twenty-two million, three hundred twenty thousand, one hundred twenty-one".