11331033355021 has 2 divisors, whose sum is σ = 11331033355022. Its totient is φ = 11331033355020.

The previous prime is 11331033355009. The next prime is 11331033355027. The reversal of 11331033355021 is 12055333013311.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10857097490121 + 473935864900 = 3295011^2 + 688430^2 .

It is a cyclic number.

It is not a de Polignac number, because 11331033355021 - 2⁵ = 11331033354989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11331033355027) 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, 5665516677510 + 5665516677511.

It is an arithmetic number, because the mean of its divisors is an integer number (5665516677511).

Almost surely, 2^{11331033355021} is an apocalyptic number.

It is an amenable number.

11331033355021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331033355021 is an equidigital number, since it uses as much as digits as its factorization.

11331033355021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 31.

Adding to 11331033355021 its reverse (12055333013311), we get a palindrome (23386366368332).

The spelling of 11331033355021 in words is "eleven trillion, three hundred thirty-one billion, thirty-three million, three hundred fifty-five thousand, twenty-one".