1231330310011 has 6 divisors (see below), whose sum is σ = 1272331944636. Its totient is φ = 1191609976500.

The previous prime is 1231330309981. The next prime is 1231330310057. The reversal of 1231330310011 is 1100130331321.

It is a de Polignac number, because none of the positive numbers 2^k-1231330310011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231330610011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 640649565 + ... + 640651486.

It is an arithmetic number, because the mean of its divisors is an integer number (212055324106).

Almost surely, 2^{1231330310011} is an apocalyptic number.

1231330310011 is a deficient number, since it is larger than the sum of its proper divisors (41001634625).

1231330310011 is an equidigital number, since it uses as much as digits as its factorization.

1231330310011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281301113 (or 1281301082 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 1231330310011 its reverse (1100130331321), we get a palindrome (2331460641332).

The spelling of 1231330310011 in words is "one trillion, two hundred thirty-one billion, three hundred thirty million, three hundred ten thousand, eleven".