21103313033 has 8 divisors (see below), whose sum is σ = 23023777440. Its totient is φ = 19183178880.

The previous prime is 21103313009. The next prime is 21103313039. The reversal of 21103313033 is 33031330112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103313033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21103312996 and 21103313014.

It is not an unprimeable number, because it can be changed into a prime (21103313039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62078 + ... + 214616.

It is an arithmetic number, because the mean of its divisors is an integer number (2877972180).

Almost surely, 2^21103313033 is an apocalyptic number.

It is an amenable number.

21103313033 is a deficient number, since it is larger than the sum of its proper divisors (1920464407).

21103313033 is a wasteful number, since it uses less digits than its factorization.

21103313033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165127.

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

Adding to 21103313033 its reverse (33031330112), we get a palindrome (54134643145).

The spelling of 21103313033 in words is "twenty-one billion, one hundred three million, three hundred thirteen thousand, thirty-three".