312100121 has 4 divisors (see below), whose sum is σ = 313969152. Its totient is φ = 310231092.

The previous prime is 312100109. The next prime is 312100123. The reversal of 312100121 is 121001213.

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 a de Polignac number, because none of the positive numbers 2^k-312100121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312100123) 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, 934265 + ... + 934598.

It is an arithmetic number, because the mean of its divisors is an integer number (78492288).

Almost surely, 2^312100121 is an apocalyptic number.

It is an amenable number.

312100121 is a deficient number, since it is larger than the sum of its proper divisors (1869031).

312100121 is a wasteful number, since it uses less digits than its factorization.

312100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869030.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 312100121 is about 17666.3556230480. The cubic root of 312100121 is about 678.3148303056.

Adding to 312100121 its reverse (121001213), we get a palindrome (433101334).

It can be divided in two parts, 3 and 12100121, that multiplied together give a palindrome (36300363).

The spelling of 312100121 in words is "three hundred twelve million, one hundred thousand, one hundred twenty-one".