11031200021 has 2 divisors, whose sum is σ = 11031200022. Its totient is φ = 11031200020.

The previous prime is 11031200009. The next prime is 11031200029. The reversal of 11031200021 is 12000213011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10965021796 + 66178225 = 104714^2 + 8135^2 .

It is a cyclic number.

It is not a de Polignac number, because 11031200021 - 2⁶ = 11031199957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11031199975 and 11031200011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11031200029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5515600010 + 5515600011.

It is an arithmetic number, because the mean of its divisors is an integer number (5515600011).

Almost surely, 2^11031200021 is an apocalyptic number.

It is an amenable number.

11031200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11031200021 is an equidigital number, since it uses as much as digits as its factorization.

11031200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 11031200021 its reverse (12000213011), we get a palindrome (23031413032).

The spelling of 11031200021 in words is "eleven billion, thirty-one million, two hundred thousand, twenty-one".