22211421 has 4 divisors (see below), whose sum is σ = 29615232. Its totient is φ = 14807612.

The previous prime is 22211417. The next prime is 22211429. The reversal of 22211421 is 12411222.

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.

It is a cyclic number.

It is not a de Polignac number, because 22211421 - 2² = 22211417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22211421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211429) 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, 3701901 + ... + 3701906.

It is an arithmetic number, because the mean of its divisors is an integer number (7403808).

Almost surely, 2^22211421 is an apocalyptic number.

It is an amenable number.

22211421 is a deficient number, since it is larger than the sum of its proper divisors (7403811).

22211421 is an equidigital number, since it uses as much as digits as its factorization.

22211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7403810.

The product of its digits is 64, while the sum is 15.

The square root of 22211421 is about 4712.8994260434. The cubic root of 22211421 is about 281.0986638670.

Adding to 22211421 its reverse (12411222), we get a palindrome (34622643).

The spelling of 22211421 in words is "twenty-two million, two hundred eleven thousand, four hundred twenty-one".