11221104421 has 2 divisors, whose sum is σ = 11221104422. Its totient is φ = 11221104420.

The previous prime is 11221104373. The next prime is 11221104443. The reversal of 11221104421 is 12440112211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5995404900 + 5225699521 = 77430^2 + 72289^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221104421 - 2²⁷ = 11086886693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221104451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610552210 + 5610552211.

It is an arithmetic number, because the mean of its divisors is an integer number (5610552211).

Almost surely, 2^11221104421 is an apocalyptic number.

It is an amenable number.

11221104421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221104421 is an equidigital number, since it uses as much as digits as its factorization.

11221104421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11221104421 its reverse (12440112211), we get a palindrome (23661216632).

The spelling of 11221104421 in words is "eleven billion, two hundred twenty-one million, one hundred four thousand, four hundred twenty-one".