22120231 has 4 divisors (see below), whose sum is σ = 25280272. Its totient is φ = 18960192.

The previous prime is 22120229. The next prime is 22120249. The reversal of 22120231 is 13202122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13202122 = 2 ⋅6601061.

It is a cyclic number.

It is not a de Polignac number, because 22120231 - 2¹ = 22120229 is a prime.

It is a super-2 number, since 2×22120231² = 978609238986722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120291) 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, 1580010 + ... + 1580023.

It is an arithmetic number, because the mean of its divisors is an integer number (6320068).

Almost surely, 2^22120231 is an apocalyptic number.

22120231 is a deficient number, since it is larger than the sum of its proper divisors (3160041).

22120231 is an equidigital number, since it uses as much as digits as its factorization.

22120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160040.

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

The square root of 22120231 is about 4703.2149642558. The cubic root of 22120231 is about 280.7134484251.

Adding to 22120231 its reverse (13202122), we get a palindrome (35322353).

The spelling of 22120231 in words is "twenty-two million, one hundred twenty thousand, two hundred thirty-one".