213122221231 has 8 divisors (see below), whose sum is σ = 213229900800. Its totient is φ = 213014577720.

The previous prime is 213122221229. The next prime is 213122221243. The reversal of 213122221231 is 132122221312.

213122221231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213122221231 - 2¹ = 213122221229 is a prime.

It is a super-2 number, since 2×213122221231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213122221201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30621930 + ... + 30628888.

It is an arithmetic number, because the mean of its divisors is an integer number (26653737600).

Almost surely, 2^213122221231 is an apocalyptic number.

213122221231 is a deficient number, since it is larger than the sum of its proper divisors (107679569).

213122221231 is an equidigital number, since it uses as much as digits as its factorization.

213122221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18029.

The product of its digits is 576, while the sum is 22.

Adding to 213122221231 its reverse (132122221312), we get a palindrome (345244442543).

The spelling of 213122221231 in words is "two hundred thirteen billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred thirty-one".