312112213033 has 4 divisors (see below), whose sum is σ = 312390141328. Its totient is φ = 311834284740.

The previous prime is 312112213027. The next prime is 312112213043. The reversal of 312112213033 is 330312211213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 330312211213 = 174989 ⋅1887617.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312112213033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312112212995 and 312112213013.

It is not an unprimeable number, because it can be changed into a prime (312112213043) 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, 138962463 + ... + 138964708.

It is an arithmetic number, because the mean of its divisors is an integer number (78097535332).

Almost surely, 2^312112213033 is an apocalyptic number.

It is an amenable number.

312112213033 is a deficient number, since it is larger than the sum of its proper divisors (277928295).

312112213033 is a wasteful number, since it uses less digits than its factorization.

312112213033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277928294.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 312112213033 its reverse (330312211213), we get a palindrome (642424424246).

The spelling of 312112213033 in words is "three hundred twelve billion, one hundred twelve million, two hundred thirteen thousand, thirty-three".