312120231020 has 96 divisors (see below), whose sum is σ = 743289388800. Its totient is φ = 109139768064.

The previous prime is 312120230987. The next prime is 312120231061. The reversal of 312120231020 is 20132021213.

It is a super-2 number, since 2×312120231020² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312120231020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16089767 + ... + 16109153.

It is an arithmetic number, because the mean of its divisors is an integer number (7742597800).

Almost surely, 2^312120231020 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 312120231020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371644694400).

312120231020 is an abundant number, since it is smaller than the sum of its proper divisors (431169157780).

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

312120231020 is a wasteful number, since it uses less digits than its factorization.

312120231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22687 (or 22685 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 312120231020 its reverse (20132021213), we get a palindrome (332252252233).

The spelling of 312120231020 in words is "three hundred twelve billion, one hundred twenty million, two hundred thirty-one thousand, twenty".