21103001302123 has 8 divisors (see below), whose sum is σ = 22810793518800. Its totient is φ = 19407278288928.

The previous prime is 21103001302079. The next prime is 21103001302129. The reversal of 21103001302123 is 32120310030112.

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 21103001302123 - 2²⁵ = 21102967747691 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 21103001302123.

It is not an unprimeable number, because it can be changed into a prime (21103001302129) 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, 3017297233 + ... + 3017304226.

It is an arithmetic number, because the mean of its divisors is an integer number (2851349189850).

Almost surely, 2^{21103001302123} is an apocalyptic number.

21103001302123 is a deficient number, since it is larger than the sum of its proper divisors (1707792216677).

21103001302123 is a wasteful number, since it uses less digits than its factorization.

21103001302123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6034601741.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21103001302123 its reverse (32120310030112), we get a palindrome (53223311332235).

The spelling of 21103001302123 in words is "twenty-one trillion, one hundred three billion, one million, three hundred two thousand, one hundred twenty-three".