31310320001231 has 16 divisors (see below), whose sum is σ = 32694075804960. Its totient is φ = 29947122616320.

The previous prime is 31310320001227. The next prime is 31310320001329. The reversal of 31310320001231 is 13210002301313.

It is a cyclic number.

It is not a de Polignac number, because 31310320001231 - 2² = 31310320001227 is a prime.

It is a super-2 number, since 2×31310320001231² (a number of 28 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 (31310320001731) 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 15 ways as a sum of consecutive naturals, for example, 3587216 + ... + 8688426.

It is an arithmetic number, because the mean of its divisors is an integer number (2043379737810).

Almost surely, 2^{31310320001231} is an apocalyptic number.

31310320001231 is a deficient number, since it is larger than the sum of its proper divisors (1383755803729).

31310320001231 is a wasteful number, since it uses less digits than its factorization.

31310320001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103226.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31310320001231 its reverse (13210002301313), we get a palindrome (44520322302544).

The spelling of 31310320001231 in words is "thirty-one trillion, three hundred ten billion, three hundred twenty million, one thousand, two hundred thirty-one".