311212203320 has 16 divisors (see below), whose sum is σ = 700227457560. Its totient is φ = 124484881312.

The previous prime is 311212203317. The next prime is 311212203373. The reversal of 311212203320 is 23302212113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 311212203292 and 311212203301.

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 3 ways as a sum of consecutive naturals, for example, 3890152502 + ... + 3890152581.

Almost surely, 2^311212203320 is an apocalyptic number.

It is an amenable number.

311212203320 is an abundant number, since it is smaller than the sum of its proper divisors (389015254240).

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

311212203320 is a wasteful number, since it uses less digits than its factorization.

311212203320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7780305094 (or 7780305090 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 311212203320 its reverse (23302212113), we get a palindrome (334514415433).

The spelling of 311212203320 in words is "three hundred eleven billion, two hundred twelve million, two hundred three thousand, three hundred twenty".