213230002313021 has 4 divisors (see below), whose sum is σ = 220582761013500. Its totient is φ = 205877243612544.

The previous prime is 213230002313011. The next prime is 213230002313033. The reversal of 213230002313021 is 120313200032312.

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 128484832063225 + 84745170249796 = 11335115^2 + 9205714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213230002313021 is a prime.

It is a super-2 number, since 2×213230002313021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213230002313011) 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, 3676379350196 + ... + 3676379350253.

It is an arithmetic number, because the mean of its divisors is an integer number (55145690253375).

Almost surely, 2^{213230002313021} is an apocalyptic number.

It is an amenable number.

213230002313021 is a deficient number, since it is larger than the sum of its proper divisors (7352758700479).

213230002313021 is an equidigital number, since it uses as much as digits as its factorization.

213230002313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7352758700478.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 213230002313021 its reverse (120313200032312), we get a palindrome (333543202345333).

The spelling of 213230002313021 in words is "two hundred thirteen trillion, two hundred thirty billion, two million, three hundred thirteen thousand, twenty-one".