213300233021 has 4 divisors (see below), whose sum is σ = 220655413500. Its totient is φ = 205945052544.

The previous prime is 213300233017. The next prime is 213300233039. The reversal of 213300233021 is 120332003312.

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 77165061796 + 136135171225 = 277786^2 + 368965^2 .

It is not a de Polignac number, because 213300233021 - 2² = 213300233017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213300232984 and 213300233002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213300233821) 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, 3677590196 + ... + 3677590253.

It is an arithmetic number, because the mean of its divisors is an integer number (55163853375).

Almost surely, 2^213300233021 is an apocalyptic number.

It is an amenable number.

213300233021 is a deficient number, since it is larger than the sum of its proper divisors (7355180479).

213300233021 is an equidigital number, since it uses as much as digits as its factorization.

213300233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7355180478.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 213300233021 its reverse (120332003312), we get a palindrome (333632236333).

The spelling of 213300233021 in words is "two hundred thirteen billion, three hundred million, two hundred thirty-three thousand, twenty-one".