311230021011 has 16 divisors (see below), whose sum is σ = 510736445184. Its totient is φ = 164165285664.

The previous prime is 311230020971. The next prime is 311230021031. The reversal of 311230021011 is 110120032113.

It is a happy number.

It is not a de Polignac number, because 311230021011 - 2⁹ = 311230020499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311230021031) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 570018081 + ... + 570018626.

It is an arithmetic number, because the mean of its divisors is an integer number (31921027824).

Almost surely, 2^311230021011 is an apocalyptic number.

311230021011 is a deficient number, since it is larger than the sum of its proper divisors (199506424173).

311230021011 is a wasteful number, since it uses less digits than its factorization.

311230021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140036730.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 311230021011 its reverse (110120032113), we get a palindrome (421350053124).

The spelling of 311230021011 in words is "three hundred eleven billion, two hundred thirty million, twenty-one thousand, eleven".