312021123438 has 32 divisors (see below), whose sum is σ = 627215239296. Its totient is φ = 103478829728.

The previous prime is 312021123397. The next prime is 312021123439. The reversal of 312021123438 is 834321120213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312021123439) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1956745 + ... + 2110187.

It is an arithmetic number, because the mean of its divisors is an integer number (19600476228).

Almost surely, 2^312021123438 is an apocalyptic number.

312021123438 is an abundant number, since it is smaller than the sum of its proper divisors (315194115858).

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

312021123438 is a wasteful number, since it uses less digits than its factorization.

312021123438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155168.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 312021123438 in words is "three hundred twelve billion, twenty-one million, one hundred twenty-three thousand, four hundred thirty-eight".