311221002220012 has 12 divisors (see below), whose sum is σ = 544703343593080. Its totient is φ = 155591475479136.

The previous prime is 311221002219973. The next prime is 311221002220013. The reversal of 311221002220012 is 210022200122113.

It is not an unprimeable number, because it can be changed into a prime (311221002220013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4756370913 + ... + 4756436344.

Almost surely, 2^{311221002220012} is an apocalyptic number.

It is an amenable number.

311221002220012 is a deficient number, since it is larger than the sum of its proper divisors (233482341373068).

311221002220012 is a wasteful number, since it uses less digits than its factorization.

311221002220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9512815440 (or 9512815438 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 311221002220012 its reverse (210022200122113), we get a palindrome (521243202342125).

The spelling of 311221002220012 in words is "three hundred eleven trillion, two hundred twenty-one billion, two million, two hundred twenty thousand, twelve".