312203121311 has 4 divisors (see below), whose sum is σ = 312206445000. Its totient is φ = 312199797624.

The previous prime is 312203121239. The next prime is 312203121371. The reversal of 312203121311 is 113121302213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312203121311 - 2³⁴ = 295023252127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312203121371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1516721 + ... + 1710218.

It is an arithmetic number, because the mean of its divisors is an integer number (78051611250).

Almost surely, 2^312203121311 is an apocalyptic number.

312203121311 is a deficient number, since it is larger than the sum of its proper divisors (3323689).

312203121311 is an equidigital number, since it uses as much as digits as its factorization.

312203121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3323688.

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

Adding to 312203121311 its reverse (113121302213), we get a palindrome (425324423524).

The spelling of 312203121311 in words is "three hundred twelve billion, two hundred three million, one hundred twenty-one thousand, three hundred eleven".