21033033113 has 12 divisors (see below), whose sum is σ = 21374221584. Its totient is φ = 20697167400.

The previous prime is 21033033107. The next prime is 21033033127. The reversal of 21033033113 is 31133033012.

It is not a de Polignac number, because 21033033113 - 2³⁴ = 3853163929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033033173) 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 11 ways as a sum of consecutive naturals, for example, 2834378 + ... + 2841788.

It is an arithmetic number, because the mean of its divisors is an integer number (1781185132).

Almost surely, 2^21033033113 is an apocalyptic number.

It is an amenable number.

21033033113 is a deficient number, since it is larger than the sum of its proper divisors (341188471).

21033033113 is an frugal number, since it uses more digits than its factorization.

21033033113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8116 (or 8045 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 21033033113 its reverse (31133033012), we get a palindrome (52166066125).

The spelling of 21033033113 in words is "twenty-one billion, thirty-three million, thirty-three thousand, one hundred thirteen".