312403123133220 has 96 divisors (see below), whose sum is σ = 999692443830528. Its totient is φ = 71406253158912.

The previous prime is 312403123133197. The next prime is 312403123133239. The reversal of 312403123133220 is 22331321304213.

It is a super-2 number, since 2×312403123133220² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 258434934 + ... + 259640946.

It is an arithmetic number, because the mean of its divisors is an integer number (10413462956568).

Almost surely, 2^{312403123133220} is an apocalyptic number.

312403123133220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312403123133220 is an abundant number, since it is smaller than the sum of its proper divisors (687289320697308).

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

312403123133220 is a wasteful number, since it uses less digits than its factorization.

312403123133220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822789 (or 1822787 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 312403123133220 its reverse (22331321304213), we get a palindrome (334734444437433).

The spelling of 312403123133220 in words is "three hundred twelve trillion, four hundred three billion, one hundred twenty-three million, one hundred thirty-three thousand, two hundred twenty".