312121412 has 6 divisors (see below), whose sum is σ = 546212478. Its totient is φ = 156060704.

The previous prime is 312121373. The next prime is 312121429. The reversal of 312121412 is 214121213.

It can be written as a sum of positive squares in only one way, i.e., 312087556 + 33856 = 17666^2 + 184^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39015173 + ... + 39015180.

It is an arithmetic number, because the mean of its divisors is an integer number (91035413).

Almost surely, 2^312121412 is an apocalyptic number.

It is an amenable number.

312121412 is a deficient number, since it is larger than the sum of its proper divisors (234091066).

312121412 is a wasteful number, since it uses less digits than its factorization.

312121412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78030357 (or 78030355 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 312121412 is about 17666.9581988525. The cubic root of 312121412 is about 678.3302544934.

Adding to 312121412 its reverse (214121213), we get a palindrome (526242625).

The spelling of 312121412 in words is "three hundred twelve million, one hundred twenty-one thousand, four hundred twelve".