21103032302123 has 4 divisors (see below), whose sum is σ = 21103457122488. Its totient is φ = 21102607481760.

The previous prime is 21103032302111. The next prime is 21103032302239. The reversal of 21103032302123 is 32120323030112.

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 21103032302123 - 2⁶ = 21103032302059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103032301123) 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, 212335661 + ... + 212435022.

It is an arithmetic number, because the mean of its divisors is an integer number (5275864280622).

Almost surely, 2^{21103032302123} is an apocalyptic number.

21103032302123 is a deficient number, since it is larger than the sum of its proper divisors (424820365).

21103032302123 is an equidigital number, since it uses as much as digits as its factorization.

21103032302123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424820364.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21103032302123 its reverse (32120323030112), we get a palindrome (53223355332235).

The spelling of 21103032302123 in words is "twenty-one trillion, one hundred three billion, thirty-two million, three hundred two thousand, one hundred twenty-three".