311321012 has 6 divisors (see below), whose sum is σ = 544811778. Its totient is φ = 155660504.

The previous prime is 311321011. The next prime is 311321027. The reversal of 311321012 is 210123113.

It can be written as a sum of positive squares in only one way, i.e., 303944356 + 7376656 = 17434^2 + 2716^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311321011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38915123 + ... + 38915130.

It is an arithmetic number, because the mean of its divisors is an integer number (90801963).

Almost surely, 2^311321012 is an apocalyptic number.

It is an amenable number.

311321012 is a deficient number, since it is larger than the sum of its proper divisors (233490766).

311321012 is a wasteful number, since it uses less digits than its factorization.

311321012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77830257 (or 77830255 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 311321012 is about 17644.2912014056. The cubic root of 311321012 is about 677.7499244509.

Adding to 311321012 its reverse (210123113), we get a palindrome (521444125).

The spelling of 311321012 in words is "three hundred eleven million, three hundred twenty-one thousand, twelve".