21031113332011 has 2 divisors, whose sum is σ = 21031113332012. Its totient is φ = 21031113332010.

The previous prime is 21031113331997. The next prime is 21031113332027. The reversal of 21031113332011 is 11023331113012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21031113332011 - 2⁹ = 21031113331499 is a prime.

It is not a weakly prime, because it can be changed into another prime (21031113332081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515556666005 + 10515556666006.

It is an arithmetic number, because the mean of its divisors is an integer number (10515556666006).

Almost surely, 2^{21031113332011} is an apocalyptic number.

21031113332011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031113332011 is an equidigital number, since it uses as much as digits as its factorization.

21031113332011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 21031113332011 its reverse (11023331113012), we get a palindrome (32054444445023).

The spelling of 21031113332011 in words is "twenty-one trillion, thirty-one billion, one hundred thirteen million, three hundred thirty-two thousand, eleven".