213231321201 has 4 divisors (see below), whose sum is σ = 284308428272. Its totient is φ = 142154214132.

The previous prime is 213231321167. The next prime is 213231321203. The reversal of 213231321201 is 102123132312.

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 not a de Polignac number, because 213231321201 - 2¹⁴ = 213231304817 is a prime.

It is a super-2 number, since 2×213231321201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213231321203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35538553531 + ... + 35538553536.

It is an arithmetic number, because the mean of its divisors is an integer number (71077107068).

Almost surely, 2^213231321201 is an apocalyptic number.

It is an amenable number.

213231321201 is a deficient number, since it is larger than the sum of its proper divisors (71077107071).

213231321201 is an equidigital number, since it uses as much as digits as its factorization.

213231321201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71077107070.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213231321201 its reverse (102123132312), we get a palindrome (315354453513).

The spelling of 213231321201 in words is "two hundred thirteen billion, two hundred thirty-one million, three hundred twenty-one thousand, two hundred one".