312203211131 has 4 divisors (see below), whose sum is σ = 356803669872. Its totient is φ = 267602752392.

The previous prime is 312203211121. The next prime is 312203211163. The reversal of 312203211131 is 131112302213.

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 312203211131 - 2²² = 312199016827 is a prime.

It is a super-2 number, since 2×312203211131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312203211121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22300229360 + ... + 22300229373.

It is an arithmetic number, because the mean of its divisors is an integer number (89200917468).

Almost surely, 2^312203211131 is an apocalyptic number.

312203211131 is a deficient number, since it is larger than the sum of its proper divisors (44600458741).

312203211131 is an equidigital number, since it uses as much as digits as its factorization.

312203211131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44600458740.

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

Adding to 312203211131 its reverse (131112302213), we get a palindrome (443315513344).

The spelling of 312203211131 in words is "three hundred twelve billion, two hundred three million, two hundred eleven thousand, one hundred thirty-one".