21330232130233 has 4 divisors (see below), whose sum is σ = 22971019217188. Its totient is φ = 19689445043280.

The previous prime is 21330232130219. The next prime is 21330232130267. The reversal of 21330232130233 is 33203123203312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10613860283664 + 10716371846569 = 3257892^2 + 3273587^2 .

It is a cyclic number.

It is not a de Polignac number, because 21330232130233 - 2⁹ = 21330232129721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330232130533) 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, 820393543458 + ... + 820393543483.

It is an arithmetic number, because the mean of its divisors is an integer number (5742754804297).

Almost surely, 2^{21330232130233} is an apocalyptic number.

It is an amenable number.

21330232130233 is a deficient number, since it is larger than the sum of its proper divisors (1640787086955).

21330232130233 is a wasteful number, since it uses less digits than its factorization.

21330232130233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640787086954.

The product of its (nonzero) digits is 11664, while the sum is 28.

Adding to 21330232130233 its reverse (33203123203312), we get a palindrome (54533355333545).

The spelling of 21330232130233 in words is "twenty-one trillion, three hundred thirty billion, two hundred thirty-two million, one hundred thirty thousand, two hundred thirty-three".