21131011333 has 8 divisors (see below), whose sum is σ = 21167209728. Its totient is φ = 21094844784.

The previous prime is 21131011273. The next prime is 21131011351. The reversal of 21131011333 is 33311013112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21131011333 - 2²⁵ = 21097456901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21131011333.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1578916 + ... + 1592242.

It is an arithmetic number, because the mean of its divisors is an integer number (2645901216).

Almost surely, 2^21131011333 is an apocalyptic number.

It is an amenable number.

21131011333 is a deficient number, since it is larger than the sum of its proper divisors (36198395).

21131011333 is a wasteful number, since it uses less digits than its factorization.

21131011333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15923.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21131011333 its reverse (33311013112), we get a palindrome (54442024445).

The spelling of 21131011333 in words is "twenty-one billion, one hundred thirty-one million, eleven thousand, three hundred thirty-three".