312021030012 has 72 divisors (see below), whose sum is σ = 774373004496. Its totient is φ = 97446818304.

The previous prime is 312021029981. The next prime is 312021030019. The reversal of 312021030012 is 210030120213.

It is a junction number, because it is equal to n+sod(n) for n = 312021029973 and 312021030000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312021030019) 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 23 ways as a sum of consecutive naturals, for example, 10129338 + ... + 10160094.

It is an arithmetic number, because the mean of its divisors is an integer number (10755180618).

Almost surely, 2^312021030012 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 312021030012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387186502248).

312021030012 is an abundant number, since it is smaller than the sum of its proper divisors (462351974484).

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

312021030012 is a wasteful number, since it uses less digits than its factorization.

312021030012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31227 (or 31002 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 312021030012 its reverse (210030120213), we get a palindrome (522051150225).

The spelling of 312021030012 in words is "three hundred twelve billion, twenty-one million, thirty thousand, twelve".