311021203312 has 20 divisors (see below), whose sum is σ = 602622933880. Its totient is φ = 155505607488.

The previous prime is 311021203289. The next prime is 311021203327. The reversal of 311021203312 is 213302120113.

It is a self number, because there is not a number n which added to its sum of digits gives 311021203312.

It is a congruent number.

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, 230203 + ... + 821605.

It is an arithmetic number, because the mean of its divisors is an integer number (30131146694).

Almost surely, 2^311021203312 is an apocalyptic number.

It is an amenable number.

311021203312 is a deficient number, since it is larger than the sum of its proper divisors (291601730568).

311021203312 is a wasteful number, since it uses less digits than its factorization.

311021203312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624280 (or 624274 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 311021203312 its reverse (213302120113), we get a palindrome (524323323425).

The spelling of 311021203312 in words is "three hundred eleven billion, twenty-one million, two hundred three thousand, three hundred twelve".