22121441 has 4 divisors (see below), whose sum is σ = 22324500. Its totient is φ = 21918384.

The previous prime is 22121431. The next prime is 22121447. The reversal of 22121441 is 14412122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8579041 + 13542400 = 2929^2 + 3680^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121441 - 2²² = 17927137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22121447) 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, 101366 + ... + 101583.

It is an arithmetic number, because the mean of its divisors is an integer number (5581125).

Almost surely, 2^22121441 is an apocalyptic number.

It is an amenable number.

22121441 is a deficient number, since it is larger than the sum of its proper divisors (203059).

22121441 is a wasteful number, since it uses less digits than its factorization.

22121441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203058.

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

The square root of 22121441 is about 4703.3435979099. The cubic root of 22121441 is about 280.7185667725.

Adding to 22121441 its reverse (14412122), we get a palindrome (36533563).

The spelling of 22121441 in words is "twenty-two million, one hundred twenty-one thousand, four hundred forty-one".