21000302233123 has 4 divisors (see below), whose sum is σ = 21000332829168. Its totient is φ = 21000271637080.

The previous prime is 21000302233111. The next prime is 21000302233153. The reversal of 21000302233123 is 32133220300012.

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 21000302233123 - 2¹⁷ = 21000302102051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000302233094 and 21000302233103.

It is not an unprimeable number, because it can be changed into a prime (21000302233153) 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, 14244268 + ... + 15649273.

It is an arithmetic number, because the mean of its divisors is an integer number (5250083207292).

Almost surely, 2^{21000302233123} is an apocalyptic number.

21000302233123 is a deficient number, since it is larger than the sum of its proper divisors (30596045).

21000302233123 is an equidigital number, since it uses as much as digits as its factorization.

21000302233123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30596044.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21000302233123 its reverse (32133220300012), we get a palindrome (53133522533135).

The spelling of 21000302233123 in words is "twenty-one trillion, three hundred two million, two hundred thirty-three thousand, one hundred twenty-three".