312132121 has 8 divisors (see below), whose sum is σ = 377706240. Its totient is φ = 251803968.

The previous prime is 312132101. The next prime is 312132143. The reversal of 312132121 is 121231213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312132121 - 2⁷ = 312131993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312132095 and 312132104.

It is not an unprimeable number, because it can be changed into a prime (312132101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1311361 + ... + 1311598.

It is an arithmetic number, because the mean of its divisors is an integer number (47213280).

Almost surely, 2^312132121 is an apocalyptic number.

It is an amenable number.

312132121 is a deficient number, since it is larger than the sum of its proper divisors (65574119).

312132121 is a wasteful number, since it uses less digits than its factorization.

312132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622983.

The product of its digits is 72, while the sum is 16.

The square root of 312132121 is about 17667.2612761571. The cubic root of 312132121 is about 678.3380123245.

Adding to 312132121 its reverse (121231213), we get a palindrome (433363334).

The spelling of 312132121 in words is "three hundred twelve million, one hundred thirty-two thousand, one hundred twenty-one".