21002130103033 has 4 divisors (see below), whose sum is σ = 21018811700880. Its totient is φ = 20985448505188.

The previous prime is 21002130102997. The next prime is 21002130103061. The reversal of 21002130103033 is 33030103120012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21002130103033 - 2⁹ = 21002130102521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21002130103033.

It is not an unprimeable number, because it can be changed into a prime (21002130103063) 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, 8340797035 + ... + 8340799552.

It is an arithmetic number, because the mean of its divisors is an integer number (5254702925220).

Almost surely, 2^{21002130103033} is an apocalyptic number.

It is an amenable number.

21002130103033 is a deficient number, since it is larger than the sum of its proper divisors (16681597847).

21002130103033 is a wasteful number, since it uses less digits than its factorization.

21002130103033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16681597846.

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

Adding to 21002130103033 its reverse (33030103120012), we get a palindrome (54032233223045).

The spelling of 21002130103033 in words is "twenty-one trillion, two billion, one hundred thirty million, one hundred three thousand, thirty-three".