1231301312011 has 2 divisors, whose sum is σ = 1231301312012. Its totient is φ = 1231301312010.

The previous prime is 1231301311993. The next prime is 1231301312029. The reversal of 1231301312011 is 1102131031321.

It is a balanced prime because it is at equal distance from previous prime (1231301311993) and next prime (1231301312029).

It is a cyclic number.

It is not a de Polignac number, because 1231301312011 - 2¹¹ = 1231301309963 is a prime.

It is a super-2 number, since 2×1231301312011² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1231301312011.

It is not a weakly prime, because it can be changed into another prime (1231301312081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615650656005 + 615650656006.

It is an arithmetic number, because the mean of its divisors is an integer number (615650656006).

Almost surely, 2^{1231301312011} is an apocalyptic number.

1231301312011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231301312011 is an equidigital number, since it uses as much as digits as its factorization.

1231301312011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1231301312011 its reverse (1102131031321), we get a palindrome (2333432343332).

The spelling of 1231301312011 in words is "one trillion, two hundred thirty-one billion, three hundred one million, three hundred twelve thousand, eleven".