311213221011 has 60 divisors (see below), whose sum is σ = 584005185456. Its totient is φ = 161669170080.

The previous prime is 311213220973. The next prime is 311213221021. The reversal of 311213221011 is 110122312113.

311213221011 is a `hidden beast` number, since 311 + 2 + 132 + 210 + 11 = 666.

It is not a de Polignac number, because 311213221011 - 2¹⁰ = 311213219987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311213221021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2199480 + ... + 2336693.

Almost surely, 2^311213221011 is an apocalyptic number.

311213221011 is a deficient number, since it is larger than the sum of its proper divisors (272791964445).

311213221011 is a wasteful number, since it uses less digits than its factorization.

311213221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536214 (or 4536194 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 311213221011 its reverse (110122312113), we get a palindrome (421335533124).

The spelling of 311213221011 in words is "three hundred eleven billion, two hundred thirteen million, two hundred twenty-one thousand, eleven".