312321200121 has 48 divisors (see below), whose sum is σ = 517429785600. Its totient is φ = 177829258464.

The previous prime is 312321200111. The next prime is 312321200137. The reversal of 312321200121 is 121002123213.

312321200121 is a `hidden beast` number, since 312 + 32 + 1 + 200 + 121 = 666.

It is not a de Polignac number, because 312321200121 - 2¹⁴ = 312321183737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312321200094 and 312321200103.

It is not an unprimeable number, because it can be changed into a prime (312321200111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23407470 + ... + 23420808.

It is an arithmetic number, because the mean of its divisors is an integer number (10779787200).

Almost surely, 2^312321200121 is an apocalyptic number.

It is an amenable number.

312321200121 is a deficient number, since it is larger than the sum of its proper divisors (205108585479).

312321200121 is a wasteful number, since it uses less digits than its factorization.

312321200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14658 (or 14655 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 312321200121 its reverse (121002123213), we get a palindrome (433323323334).

The spelling of 312321200121 in words is "three hundred twelve billion, three hundred twenty-one million, two hundred thousand, one hundred twenty-one".