312616121 has 4 divisors (see below), whose sum is σ = 322700544. Its totient is φ = 302531700.

The previous prime is 312616091. The next prime is 312616127. The reversal of 312616121 is 121616213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312616121 - 2²⁶ = 245507257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312616127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5042165 + ... + 5042226.

It is an arithmetic number, because the mean of its divisors is an integer number (80675136).

Almost surely, 2^312616121 is an apocalyptic number.

312616121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

312616121 is a deficient number, since it is larger than the sum of its proper divisors (10084423).

312616121 is a wasteful number, since it uses less digits than its factorization.

312616121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10084422.

The product of its digits is 432, while the sum is 23.

The square root of 312616121 is about 17680.9536224718. The cubic root of 312616121 is about 678.6884473099.

The spelling of 312616121 in words is "three hundred twelve million, six hundred sixteen thousand, one hundred twenty-one".