21133311030311 has 4 divisors (see below), whose sum is σ = 21133327351032. Its totient is φ = 21133294709592.

The previous prime is 21133311030241. The next prime is 21133311030313. The reversal of 21133311030311 is 11303011333112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21133311030311 - 2³⁴ = 21116131161127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133311030313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6033221 + ... + 8869406.

It is an arithmetic number, because the mean of its divisors is an integer number (5283331837758).

Almost surely, 2^{21133311030311} is an apocalyptic number.

21133311030311 is a deficient number, since it is larger than the sum of its proper divisors (16320721).

21133311030311 is a wasteful number, since it uses less digits than its factorization.

21133311030311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16320720.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 21133311030311 its reverse (11303011333112), we get a palindrome (32436322363423).

The spelling of 21133311030311 in words is "twenty-one trillion, one hundred thirty-three billion, three hundred eleven million, thirty thousand, three hundred eleven".