11221004421 has 24 divisors (see below), whose sum is σ = 17739225504. Its totient is φ = 6778438560.

The previous prime is 11221004419. The next prime is 11221004527. The reversal of 11221004421 is 12440012211.

11221004421 is a `hidden beast` number, since 1 + 1 + 221 + 0 + 0 + 442 + 1 = 666.

It is not a de Polignac number, because 11221004421 - 2¹ = 11221004419 is a prime.

It is a super-2 number, since 2×11221004421² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11221004394 and 11221004403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221004321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154206 + ... + 214991.

It is an arithmetic number, because the mean of its divisors is an integer number (739134396).

Almost surely, 2^11221004421 is an apocalyptic number.

11221004421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221004421 is a deficient number, since it is larger than the sum of its proper divisors (6518221083).

11221004421 is a wasteful number, since it uses less digits than its factorization.

11221004421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369521 (or 369518 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11221004421 its reverse (12440012211), we get a palindrome (23661016632).

The spelling of 11221004421 in words is "eleven billion, two hundred twenty-one million, four thousand, four hundred twenty-one".