312220211131 has 4 divisors (see below), whose sum is σ = 312223573264. Its totient is φ = 312216849000.

The previous prime is 312220211057. The next prime is 312220211161. The reversal of 312220211131 is 131112022213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131112022213 = 239 ⋅548585867.

It is a cyclic number.

It is not a de Polignac number, because 312220211131 - 2⁷ = 312220211003 is a prime.

It is a super-2 number, since 2×312220211131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312220211099 and 312220211108.

It is not an unprimeable number, because it can be changed into a prime (312220211161) 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, 1537695 + ... + 1728856.

It is an arithmetic number, because the mean of its divisors is an integer number (78055893316).

Almost surely, 2^312220211131 is an apocalyptic number.

312220211131 is a deficient number, since it is larger than the sum of its proper divisors (3362133).

312220211131 is an equidigital number, since it uses as much as digits as its factorization.

312220211131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362132.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 312220211131 its reverse (131112022213), we get a palindrome (443332233344).

The spelling of 312220211131 in words is "three hundred twelve billion, two hundred twenty million, two hundred eleven thousand, one hundred thirty-one".