11121004421 has 2 divisors, whose sum is σ = 11121004422. Its totient is φ = 11121004420.

The previous prime is 11121004417. The next prime is 11121004457. The reversal of 11121004421 is 12440012111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10839100321 + 281904100 = 104111^2 + 16790^2 .

It is an emirp because it is prime and its reverse (12440012111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11121004421 - 2² = 11121004417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11121004421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121004481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560502210 + 5560502211.

It is an arithmetic number, because the mean of its divisors is an integer number (5560502211).

Almost surely, 2^11121004421 is an apocalyptic number.

It is an amenable number.

11121004421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121004421 is an equidigital number, since it uses as much as digits as its factorization.

11121004421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11121004421 its reverse (12440012111), we get a palindrome (23561016532).

The spelling of 11121004421 in words is "eleven billion, one hundred twenty-one million, four thousand, four hundred twenty-one".