21133040311 has 4 divisors (see below), whose sum is σ = 21133566832. Its totient is φ = 21132513792.

The previous prime is 21133040267. The next prime is 21133040317. The reversal of 21133040311 is 11304033112.

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 21133040311 - 2¹³ = 21133032119 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 (21133040317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197595 + ... + 285148.

It is an arithmetic number, because the mean of its divisors is an integer number (5283391708).

Almost surely, 2^21133040311 is an apocalyptic number.

21133040311 is a deficient number, since it is larger than the sum of its proper divisors (526521).

21133040311 is an equidigital number, since it uses as much as digits as its factorization.

21133040311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526520.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21133040311 its reverse (11304033112), we get a palindrome (32437073423).

The spelling of 21133040311 in words is "twenty-one billion, one hundred thirty-three million, forty thousand, three hundred eleven".