21031133333 has 24 divisors (see below), whose sum is σ = 25111752192. Its totient is φ = 17241459552.

The previous prime is 21031133329. The next prime is 21031133339. The reversal of 21031133333 is 33333113012.

It is not a de Polignac number, because 21031133333 - 2² = 21031133329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21031133299 and 21031133308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031133339) 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, 889916 + ... + 913242.

It is an arithmetic number, because the mean of its divisors is an integer number (1046323008).

Almost surely, 2^21031133333 is an apocalyptic number.

It is an amenable number.

21031133333 is a deficient number, since it is larger than the sum of its proper divisors (4080618859).

21031133333 is an equidigital number, since it uses as much as digits as its factorization.

21031133333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23489 (or 23430 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 21031133333 its reverse (33333113012), we get a palindrome (54364246345).

The spelling of 21031133333 in words is "twenty-one billion, thirty-one million, one hundred thirty-three thousand, three hundred thirty-three".