312212103131421 has 12 divisors (see below), whose sum is σ = 450975056638080. Its totient is φ = 208140470342280.

The previous prime is 312212103131413. The next prime is 312212103131447. The reversal of 312212103131421 is 124131301212213.

312212103131421 is a `hidden beast` number, since 3 + 1 + 2 + 2 + 1 + 2 + 103 + 131 + 421 = 666.

It is not a de Polignac number, because 312212103131421 - 2³ = 312212103131413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312212103131521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75520191 + ... + 79546988.

It is an arithmetic number, because the mean of its divisors is an integer number (37581254719840).

Almost surely, 2^{312212103131421} is an apocalyptic number.

It is an amenable number.

312212103131421 is a deficient number, since it is larger than the sum of its proper divisors (138762953506659).

312212103131421 is a wasteful number, since it uses less digits than its factorization.

312212103131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155290896 (or 155290893 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 312212103131421 its reverse (124131301212213), we get a palindrome (436343404343634).

The spelling of 312212103131421 in words is "three hundred twelve trillion, two hundred twelve billion, one hundred three million, one hundred thirty-one thousand, four hundred twenty-one".