1231340240201 has 4 divisors (see below), whose sum is σ = 1246926825600. Its totient is φ = 1215753654804.

The previous prime is 1231340240191. The next prime is 1231340240203. The reversal of 1231340240201 is 1020420431321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231340240201 - 2²² = 1231336045897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231340240203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7793292581 + ... + 7793292738.

It is an arithmetic number, because the mean of its divisors is an integer number (311731706400).

Almost surely, 2^{1231340240201} is an apocalyptic number.

It is an amenable number.

1231340240201 is a deficient number, since it is larger than the sum of its proper divisors (15586585399).

1231340240201 is an equidigital number, since it uses as much as digits as its factorization.

1231340240201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15586585398.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1231340240201 its reverse (1020420431321), we get a palindrome (2251760671522).

The spelling of 1231340240201 in words is "one trillion, two hundred thirty-one billion, three hundred forty million, two hundred forty thousand, two hundred one".