311021222012 has 12 divisors (see below), whose sum is σ = 544991267016. Its totient is φ = 155309431440.

The previous prime is 311021222011. The next prime is 311021222053. The reversal of 311021222012 is 210222120113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311021222011) 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 3 ways as a sum of consecutive naturals, for example, 50291414 + ... + 50297597.

It is an arithmetic number, because the mean of its divisors is an integer number (45415938918).

Almost surely, 2^311021222012 is an apocalyptic number.

It is an amenable number.

311021222012 is a deficient number, since it is larger than the sum of its proper divisors (233970045004).

311021222012 is a wasteful number, since it uses less digits than its factorization.

311021222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100589788 (or 100589786 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 311021222012 its reverse (210222120113), we get a palindrome (521243342125).

The spelling of 311021222012 in words is "three hundred eleven billion, twenty-one million, two hundred twenty-two thousand, twelve".