312123101321212 has 12 divisors (see below), whose sum is σ = 546215565731976. Its totient is φ = 156061511112080.

The previous prime is 312123101321209. The next prime is 312123101321231. The reversal of 312123101321212 is 212123101321213.

It is a super-2 number, since 2×312123101321212² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14619387 + ... + 28947757.

It is an arithmetic number, because the mean of its divisors is an integer number (45517963810998).

Almost surely, 2^{312123101321212} is an apocalyptic number.

It is an amenable number.

312123101321212 is a deficient number, since it is larger than the sum of its proper divisors (234092464410764).

312123101321212 is a wasteful number, since it uses less digits than its factorization.

312123101321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19774268 (or 19774266 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 312123101321212 its reverse (212123101321213), we get a palindrome (524246202642425).

Subtracting from 312123101321212 its reverse (212123101321213), we obtain a palindrome (99999999999999).

The spelling of 312123101321212 in words is "three hundred twelve trillion, one hundred twenty-three billion, one hundred one million, three hundred twenty-one thousand, two hundred twelve".