312121112033 has 4 divisors (see below), whose sum is σ = 312122280708. Its totient is φ = 312119943360.

The previous prime is 312121112003. The next prime is 312121112063. The reversal of 312121112033 is 330211121213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (312121112003) and next prime (312121112063).

It can be written as a sum of positive squares in 2 ways, for example, as 277741648144 + 34379463889 = 527012^2 + 185417^2 .

It is a cyclic number.

It is not a de Polignac number, because 312121112033 - 2⁸ = 312121111777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312121111996 and 312121112014.

It is not an unprimeable number, because it can be changed into a prime (312121112003) 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, 35285 + ... + 790877.

It is an arithmetic number, because the mean of its divisors is an integer number (78030570177).

Almost surely, 2^312121112033 is an apocalyptic number.

It is an amenable number.

312121112033 is a deficient number, since it is larger than the sum of its proper divisors (1168675).

312121112033 is an equidigital number, since it uses as much as digits as its factorization.

312121112033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168674.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 312121112033 its reverse (330211121213), we get a palindrome (642332233246).

The spelling of 312121112033 in words is "three hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, thirty-three".