21102003133 has 8 divisors (see below), whose sum is σ = 21674702808. Its totient is φ = 20529428544.

The previous prime is 21102003101. The next prime is 21102003161. The reversal of 21102003133 is 33130020112.

It can be written as a sum of positive squares in 4 ways, for example, as 9251938969 + 11850064164 = 96187^2 + 108858^2 .

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 21102003133 - 2⁵ = 21102003101 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 (21102003233) 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 7 ways as a sum of consecutive naturals, for example, 384735 + ... + 436147.

It is an arithmetic number, because the mean of its divisors is an integer number (2709337851).

Almost surely, 2^21102003133 is an apocalyptic number.

It is an amenable number.

21102003133 is a deficient number, since it is larger than the sum of its proper divisors (572699675).

21102003133 is a wasteful number, since it uses less digits than its factorization.

21102003133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62543.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21102003133 its reverse (33130020112), we get a palindrome (54232023245).

The spelling of 21102003133 in words is "twenty-one billion, one hundred two million, three thousand, one hundred thirty-three".