21102303133 has 4 divisors (see below), whose sum is σ = 22343615100. Its totient is φ = 19860991168.

The previous prime is 21102303113. The next prime is 21102303169. The reversal of 21102303133 is 33130320112.

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 12663676089 + 8438627044 = 112533^2 + 91862^2 .

It is a cyclic number.

It is not a de Polignac number, because 21102303133 - 2⁹ = 21102302621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21102303133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102303113) 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, 620655958 + ... + 620655991.

It is an arithmetic number, because the mean of its divisors is an integer number (5585903775).

Almost surely, 2^21102303133 is an apocalyptic number.

It is an amenable number.

21102303133 is a deficient number, since it is larger than the sum of its proper divisors (1241311967).

21102303133 is a wasteful number, since it uses less digits than its factorization.

21102303133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241311966.

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

Adding to 21102303133 its reverse (33130320112), we get a palindrome (54232623245).

The spelling of 21102303133 in words is "twenty-one billion, one hundred two million, three hundred three thousand, one hundred thirty-three".