11124004721 has 2 divisors, whose sum is σ = 11124004722. Its totient is φ = 11124004720.

The previous prime is 11124004687. The next prime is 11124004739. The reversal of 11124004721 is 12740042111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9924144400 + 1199860321 = 99620^2 + 34639^2 .

It is a cyclic number.

It is not a de Polignac number, because 11124004721 - 2¹⁰ = 11124003697 is a prime.

It is not a weakly prime, because it can be changed into another prime (11124004741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5562002360 + 5562002361.

It is an arithmetic number, because the mean of its divisors is an integer number (5562002361).

Almost surely, 2^11124004721 is an apocalyptic number.

It is an amenable number.

11124004721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11124004721 is an equidigital number, since it uses as much as digits as its factorization.

11124004721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 11124004721 its reverse (12740042111), we get a palindrome (23864046832).

The spelling of 11124004721 in words is "eleven billion, one hundred twenty-four million, four thousand, seven hundred twenty-one".