213221340443344 has 40 divisors (see below), whose sum is σ = 424494437581440. Its totient is φ = 103702220863488.

The previous prime is 213221340443281. The next prime is 213221340443351. The reversal of 213221340443344 is 443344043122312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 213221340443297 and 213221340443306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 869629009 + ... + 869874160.

It is an arithmetic number, because the mean of its divisors is an integer number (10612360939536).

Almost surely, 2^{213221340443344} is an apocalyptic number.

It is an amenable number.

213221340443344 is a deficient number, since it is larger than the sum of its proper divisors (211273097138096).

213221340443344 is a wasteful number, since it uses less digits than its factorization.

213221340443344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739503387 (or 1739503381 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 40.

Adding to 213221340443344 its reverse (443344043122312), we get a palindrome (656565383565656).

The spelling of 213221340443344 in words is "two hundred thirteen trillion, two hundred twenty-one billion, three hundred forty million, four hundred forty-three thousand, three hundred forty-four".