21302123203133 has 4 divisors (see below), whose sum is σ = 21302672506368. Its totient is φ = 21301573899900.

The previous prime is 21302123203121. The next prime is 21302123203171. The reversal of 21302123203133 is 33130232120312.

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 21302123203133 - 2¹² = 21302123199037 is a prime.

It is a super-2 number, since 2×21302123203133² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302123203103) 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, 274593443 + ... + 274671008.

It is an arithmetic number, because the mean of its divisors is an integer number (5325668126592).

Almost surely, 2^{21302123203133} is an apocalyptic number.

It is an amenable number.

21302123203133 is a deficient number, since it is larger than the sum of its proper divisors (549303235).

21302123203133 is an equidigital number, since it uses as much as digits as its factorization.

21302123203133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549303234.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21302123203133 its reverse (33130232120312), we get a palindrome (54432355323445).

The spelling of 21302123203133 in words is "twenty-one trillion, three hundred two billion, one hundred twenty-three million, two hundred three thousand, one hundred thirty-three".