21331489311 has 24 divisors (see below), whose sum is σ = 35074705536. Its totient is φ = 12366079440.

The previous prime is 21331489301. The next prime is 21331489337. The reversal of 21331489311 is 11398413312.

21331489311 is a `hidden beast` number, since 2 + 1 + 331 + 4 + 8 + 9 + 311 = 666.

It is not a de Polignac number, because 21331489311 - 2³⁴ = 4151620127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331489301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4681845 + ... + 4686398.

It is an arithmetic number, because the mean of its divisors is an integer number (1461446064).

Almost surely, 2^21331489311 is an apocalyptic number.

21331489311 is a deficient number, since it is larger than the sum of its proper divisors (13743216225).

21331489311 is a wasteful number, since it uses less digits than its factorization.

21331489311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9368283 (or 9368280 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The spelling of 21331489311 in words is "twenty-one billion, three hundred thirty-one million, four hundred eighty-nine thousand, three hundred eleven".