1231303211312 has 10 divisors (see below), whose sum is σ = 2385649971948. Its totient is φ = 615651605648.

The previous prime is 1231303211311. The next prime is 1231303211317. The reversal of 1231303211312 is 2131123031321.

It is a super-2 number, since 2×1231303211312² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231303211311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38478225338 + ... + 38478225369.

Almost surely, 2^{1231303211312} is an apocalyptic number.

It is an amenable number.

1231303211312 is a deficient number, since it is larger than the sum of its proper divisors (1154346760636).

1231303211312 is an equidigital number, since it uses as much as digits as its factorization.

1231303211312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76956450715 (or 76956450709 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1231303211312 its reverse (2131123031321), we get a palindrome (3362426242633).

The spelling of 1231303211312 in words is "one trillion, two hundred thirty-one billion, three hundred three million, two hundred eleven thousand, three hundred twelve".