213321213412 has 12 divisors (see below), whose sum is σ = 373332663340. Its totient is φ = 106654738176.

The previous prime is 213321213401. The next prime is 213321213461. The reversal of 213321213412 is 214312123312.

It can be written as a sum of positive squares in 2 ways, for example, as 144647866276 + 68673347136 = 380326^2 + 262056^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384833 + ... + 1531144.

Almost surely, 2^213321213412 is an apocalyptic number.

It is an amenable number.

213321213412 is a deficient number, since it is larger than the sum of its proper divisors (160011449928).

213321213412 is a wasteful number, since it uses less digits than its factorization.

213321213412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934270 (or 2934268 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 213321213412 its reverse (214312123312), we get a palindrome (427633336724).

The spelling of 213321213412 in words is "two hundred thirteen billion, three hundred twenty-one million, two hundred thirteen thousand, four hundred twelve".