612221622312 has 128 divisors (see below), whose sum is σ = 1621264896000. Its totient is φ = 192118417920.

The previous prime is 612221622307. The next prime is 612221622323. The reversal of 612221622312 is 213226122216.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 612221622312.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47236489 + ... + 47249447.

It is an arithmetic number, because the mean of its divisors is an integer number (12666132000).

Almost surely, 2^612221622312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612221622312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810632448000).

612221622312 is an abundant number, since it is smaller than the sum of its proper divisors (1009043273688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612221622312 is a wasteful number, since it uses less digits than its factorization.

612221622312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13631 (or 13627 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

Adding to 612221622312 its reverse (213226122216), we get a palindrome (825447744528).

The spelling of 612221622312 in words is "six hundred twelve billion, two hundred twenty-one million, six hundred twenty-two thousand, three hundred twelve".