21103202133 has 16 divisors (see below), whose sum is σ = 33668927040. Its totient is φ = 12986585712.

The previous prime is 21103202117. The next prime is 21103202143. The reversal of 21103202133 is 33120230112.

21103202133 is a `hidden beast` number, since 211 + 0 + 320 + 2 + 133 = 666.

It is not a de Polignac number, because 21103202133 - 2⁴ = 21103202117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103202143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30061191 + ... + 30061892.

It is an arithmetic number, because the mean of its divisors is an integer number (2104307940).

Almost surely, 2^21103202133 is an apocalyptic number.

It is an amenable number.

21103202133 is a deficient number, since it is larger than the sum of its proper divisors (12565724907).

21103202133 is a wasteful number, since it uses less digits than its factorization.

21103202133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60123105 (or 60123099 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21103202133 its reverse (33120230112), we get a palindrome (54223432245).

The spelling of 21103202133 in words is "twenty-one billion, one hundred three million, two hundred two thousand, one hundred thirty-three".