312011121 has 8 divisors (see below), whose sum is σ = 427258624. Its totient is φ = 202385520.

The previous prime is 312011111. The next prime is 312011137. The reversal of 312011121 is 121110213.

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

It is not a de Polignac number, because 312011121 - 2¹⁵ = 311978353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312011097 and 312011106.

It is not an unprimeable number, because it can be changed into a prime (312011111) 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, 1405345 + ... + 1405566.

It is an arithmetic number, because the mean of its divisors is an integer number (53407328).

Almost surely, 2^312011121 is an apocalyptic number.

It is an amenable number.

312011121 is a deficient number, since it is larger than the sum of its proper divisors (115247503).

312011121 is a wasteful number, since it uses less digits than its factorization.

312011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810951.

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

The square root of 312011121 is about 17663.8365311729. The cubic root of 312011121 is about 678.2503469820.

Adding to 312011121 its reverse (121110213), we get a palindrome (433121334).

It can be divided in two parts, 3120 and 11121, that added together give a palindrome (14241).

The spelling of 312011121 in words is "three hundred twelve million, eleven thousand, one hundred twenty-one".