22110421 has 4 divisors (see below), whose sum is σ = 23411052. Its totient is φ = 20809792.

The previous prime is 22110419. The next prime is 22110443. The reversal of 22110421 is 12401122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12401122 = 2 ⋅6200561.

It can be written as a sum of positive squares in 2 ways, for example, as 8346321 + 13764100 = 2889^2 + 3710^2 .

It is a cyclic number.

It is not a de Polignac number, because 22110421 - 2¹ = 22110419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650290 + ... + 650323.

It is an arithmetic number, because the mean of its divisors is an integer number (5852763).

Almost surely, 2^22110421 is an apocalyptic number.

It is an amenable number.

22110421 is a deficient number, since it is larger than the sum of its proper divisors (1300631).

22110421 is a wasteful number, since it uses less digits than its factorization.

22110421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300630.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 22110421 is about 4702.1719449633. The cubic root of 22110421 is about 280.6719448483.

Adding to 22110421 its reverse (12401122), we get a palindrome (34511543).

The spelling of 22110421 in words is "twenty-two million, one hundred ten thousand, four hundred twenty-one".