312211111000 has 64 divisors (see below), whose sum is σ = 731271584160. Its totient is φ = 124765200000.

The previous prime is 312211110983. The next prime is 312211111031. The reversal of 312211111000 is 111112213.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 902470 + ... + 1199530.

Almost surely, 2^312211111000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312211111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365635792080).

312211111000 is an abundant number, since it is smaller than the sum of its proper divisors (419060473160).

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

312211111000 is a wasteful number, since it uses less digits than its factorization.

312211111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298133 (or 298119 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 312211111000 its reverse (111112213), we get a palindrome (312322223213).

The spelling of 312211111000 in words is "three hundred twelve billion, two hundred eleven million, one hundred eleven thousand".