22411421 has 4 divisors (see below), whose sum is σ = 22834332. Its totient is φ = 21988512.

The previous prime is 22411409. The next prime is 22411427. The reversal of 22411421 is 12411422.

22411421 = T₈₉₃ + T₈₉₄ + ... + T₉₄₅.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12411422 = 2 ⋅6205711.

It can be written as a sum of positive squares in 2 ways, for example, as 11978521 + 10432900 = 3461^2 + 3230^2 .

It is a cyclic number.

It is not a de Polignac number, because 22411421 - 2²² = 18217117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22411421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22411427) 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, 211376 + ... + 211481.

It is an arithmetic number, because the mean of its divisors is an integer number (5708583).

Almost surely, 2^22411421 is an apocalyptic number.

It is an amenable number.

22411421 is a deficient number, since it is larger than the sum of its proper divisors (422911).

22411421 is an equidigital number, since it uses as much as digits as its factorization.

22411421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422910.

The product of its digits is 128, while the sum is 17.

The square root of 22411421 is about 4734.0702360654. The cubic root of 22411421 is about 281.9398501894.

Adding to 22411421 its reverse (12411422), we get a palindrome (34822843).

Subtracting from 22411421 its reverse (12411422), we obtain a palindrome (9999999).

The spelling of 22411421 in words is "twenty-two million, four hundred eleven thousand, four hundred twenty-one".