21033302113 has 4 divisors (see below), whose sum is σ = 21154882068. Its totient is φ = 20911722160.

The previous prime is 21033302063. The next prime is 21033302117. The reversal of 21033302113 is 31120333012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12101540049 + 8931762064 = 110007^2 + 94508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033302113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033302117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60789718 + ... + 60790063.

It is an arithmetic number, because the mean of its divisors is an integer number (5288720517).

Almost surely, 2^21033302113 is an apocalyptic number.

It is an amenable number.

21033302113 is a deficient number, since it is larger than the sum of its proper divisors (121579955).

21033302113 is a wasteful number, since it uses less digits than its factorization.

21033302113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121579954.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21033302113 its reverse (31120333012), we get a palindrome (52153635125).

The spelling of 21033302113 in words is "twenty-one billion, thirty-three million, three hundred two thousand, one hundred thirteen".