311211210123212 has 36 divisors (see below), whose sum is σ = 633728335264920. Its totient is φ = 133335974185344.

The previous prime is 311211210123179. The next prime is 311211210123223. The reversal of 311211210123212 is 212321012112113.

It is a super-2 number, since 2×311211210123212² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 238984262 + ... + 240282957.

It is an arithmetic number, because the mean of its divisors is an integer number (17603564868470).

Almost surely, 2^{311211210123212} is an apocalyptic number.

It is an amenable number.

311211210123212 is an abundant number, since it is smaller than the sum of its proper divisors (322517125141708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311211210123212 is a wasteful number, since it uses less digits than its factorization.

311211210123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479270550 (or 479270541 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 311211210123212 its reverse (212321012112113), we get a palindrome (523532222235325).

The spelling of 311211210123212 in words is "three hundred eleven trillion, two hundred eleven billion, two hundred ten million, one hundred twenty-three thousand, two hundred twelve".