21033101311111 has 2 divisors, whose sum is σ = 21033101311112. Its totient is φ = 21033101311110.

The previous prime is 21033101311067. The next prime is 21033101311199. The reversal of 21033101311111 is 11111310133012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21033101311111 - 2¹⁹ = 21033100786823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21033101371111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516550655555 + 10516550655556.

It is an arithmetic number, because the mean of its divisors is an integer number (10516550655556).

Almost surely, 2^{21033101311111} is an apocalyptic number.

21033101311111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033101311111 is an equidigital number, since it uses as much as digits as its factorization.

21033101311111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 21033101311111 its reverse (11111310133012), we get a palindrome (32144411444123).

The spelling of 21033101311111 in words is "twenty-one trillion, thirty-three billion, one hundred one million, three hundred eleven thousand, one hundred eleven".