21002233103 has 4 divisors (see below), whose sum is σ = 21003684168. Its totient is φ = 21000782040.

The previous prime is 21002233093. The next prime is 21002233117. The reversal of 21002233103 is 30133220012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21002233103 - 2⁶ = 21002233039 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 (21002233123) 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, 703601 + ... + 732842.

It is an arithmetic number, because the mean of its divisors is an integer number (5250921042).

Almost surely, 2^21002233103 is an apocalyptic number.

21002233103 is a deficient number, since it is larger than the sum of its proper divisors (1451065).

21002233103 is a wasteful number, since it uses less digits than its factorization.

21002233103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451064.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21002233103 its reverse (30133220012), we get a palindrome (51135453115).

The spelling of 21002233103 in words is "twenty-one billion, two million, two hundred thirty-three thousand, one hundred three".