21033352133 has 8 divisors (see below), whose sum is σ = 21952664448. Its totient is φ = 20114441424.

The previous prime is 21033352129. The next prime is 21033352169. The reversal of 21033352133 is 33125333012.

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 21033352133 - 2² = 21033352129 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 (21033352733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9191 + ... + 205307.

It is an arithmetic number, because the mean of its divisors is an integer number (2744083056).

Almost surely, 2^21033352133 is an apocalyptic number.

21033352133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21033352133 is a deficient number, since it is larger than the sum of its proper divisors (919312315).

21033352133 is a wasteful number, since it uses less digits than its factorization.

21033352133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200803.

The product of its (nonzero) digits is 4860, while the sum is 26.

Adding to 21033352133 its reverse (33125333012), we get a palindrome (54158685145).

The spelling of 21033352133 in words is "twenty-one billion, thirty-three million, three hundred fifty-two thousand, one hundred thirty-three".