11554334021 has 2 divisors, whose sum is σ = 11554334022. Its totient is φ = 11554334020.

The previous prime is 11554333957. The next prime is 11554334039. The reversal of 11554334021 is 12043345511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11553885121 + 448900 = 107489^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 11554334021 - 2⁶ = 11554333957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11554334041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5777167010 + 5777167011.

It is an arithmetic number, because the mean of its divisors is an integer number (5777167011).

Almost surely, 2^11554334021 is an apocalyptic number.

It is an amenable number.

11554334021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11554334021 is an equidigital number, since it uses as much as digits as its factorization.

11554334021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 11554334021 its reverse (12043345511), we get a palindrome (23597679532).

The spelling of 11554334021 in words is "eleven billion, five hundred fifty-four million, three hundred thirty-four thousand, twenty-one".