11110000018021 has 2 divisors, whose sum is σ = 11110000018022. Its totient is φ = 11110000018020.

The previous prime is 11110000017929. The next prime is 11110000018043. The reversal of 11110000018021 is 12081000001111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5601055889025 + 5508944128996 = 2366655^2 + 2347114^2 .

It is a cyclic number.

It is not a de Polignac number, because 11110000018021 - 2¹¹ = 11110000015973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11110000017986 and 11110000018004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11110000018321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555000009010 + 5555000009011.

It is an arithmetic number, because the mean of its divisors is an integer number (5555000009011).

Almost surely, 2^{11110000018021} is an apocalyptic number.

It is an amenable number.

11110000018021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11110000018021 is an equidigital number, since it uses as much as digits as its factorization.

11110000018021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11110000018021 its reverse (12081000001111), we get a palindrome (23191000019132).

The spelling of 11110000018021 in words is "eleven trillion, one hundred ten billion, eighteen thousand, twenty-one".