21133033230313 has 4 divisors (see below), whose sum is σ = 21133080062608. Its totient is φ = 21132986398020.

The previous prime is 21133033230307. The next prime is 21133033230373. The reversal of 21133033230313 is 31303233033112.

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 a de Polignac number, because none of the positive numbers 2^k-21133033230313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21133033230373) 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, 22732623 + ... + 23643988.

It is an arithmetic number, because the mean of its divisors is an integer number (5283270015652).

Almost surely, 2^{21133033230313} is an apocalyptic number.

It is an amenable number.

21133033230313 is a deficient number, since it is larger than the sum of its proper divisors (46832295).

21133033230313 is an equidigital number, since it uses as much as digits as its factorization.

21133033230313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46832294.

The product of its (nonzero) digits is 8748, while the sum is 28.

Adding to 21133033230313 its reverse (31303233033112), we get a palindrome (52436266263425).

The spelling of 21133033230313 in words is "twenty-one trillion, one hundred thirty-three billion, thirty-three million, two hundred thirty thousand, three hundred thirteen".