213231421244 has 24 divisors (see below), whose sum is σ = 378159546240. Its totient is φ = 105189297584.

The previous prime is 213231421237. The next prime is 213231421253. The reversal of 213231421244 is 442124132312.

213231421244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 185534 + ... + 678885.

It is an arithmetic number, because the mean of its divisors is an integer number (15756647760).

Almost surely, 2^213231421244 is an apocalyptic number.

It is an amenable number.

213231421244 is a deficient number, since it is larger than the sum of its proper divisors (164928124996).

213231421244 is a wasteful number, since it uses less digits than its factorization.

213231421244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865249 (or 865247 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

Adding to 213231421244 its reverse (442124132312), we get a palindrome (655355553556).

The spelling of 213231421244 in words is "two hundred thirteen billion, two hundred thirty-one million, four hundred twenty-one thousand, two hundred forty-four".