311033310212 has 6 divisors (see below), whose sum is σ = 544308292878. Its totient is φ = 155516655104.

The previous prime is 311033310191. The next prime is 311033310229. The reversal of 311033310212 is 212013330113.

It can be written as a sum of positive squares in only one way, i.e., 177825829636 + 133207480576 = 421694^2 + 364976^2 .

It is a super-2 number, since 2×311033310212² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38879163773 + ... + 38879163780.

It is an arithmetic number, because the mean of its divisors is an integer number (90718048813).

Almost surely, 2^311033310212 is an apocalyptic number.

It is an amenable number.

311033310212 is a deficient number, since it is larger than the sum of its proper divisors (233274982666).

311033310212 is a wasteful number, since it uses less digits than its factorization.

311033310212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77758327557 (or 77758327555 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 311033310212 its reverse (212013330113), we get a palindrome (523046640325).

The spelling of 311033310212 in words is "three hundred eleven billion, thirty-three million, three hundred ten thousand, two hundred twelve".