312201231031 has 4 divisors (see below), whose sum is σ = 312207546064. Its totient is φ = 312194916000.

The previous prime is 312201230977. The next prime is 312201231047. The reversal of 312201231031 is 130132102213.

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 312201231031 - 2²¹ = 312199133879 is a prime.

It is a super-2 number, since 2×312201231031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312201231071) 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, 3082770 + ... + 3182431.

It is an arithmetic number, because the mean of its divisors is an integer number (78051886516).

Almost surely, 2^312201231031 is an apocalyptic number.

312201231031 is a deficient number, since it is larger than the sum of its proper divisors (6315033).

312201231031 is an equidigital number, since it uses as much as digits as its factorization.

312201231031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6315032.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 312201231031 its reverse (130132102213), we get a palindrome (442333333244).

The spelling of 312201231031 in words is "three hundred twelve billion, two hundred one million, two hundred thirty-one thousand, thirty-one".