1231344040181 has 2 divisors, whose sum is σ = 1231344040182. Its totient is φ = 1231344040180.

The previous prime is 1231344040153. The next prime is 1231344040217. The reversal of 1231344040181 is 1810404431321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 973904501956 + 257439538225 = 986866^2 + 507385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231344040181 - 2¹⁰ = 1231344039157 is a prime.

It is a super-2 number, since 2×1231344040181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231344040141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615672020090 + 615672020091.

It is an arithmetic number, because the mean of its divisors is an integer number (615672020091).

Almost surely, 2^{1231344040181} is an apocalyptic number.

It is an amenable number.

1231344040181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231344040181 is an equidigital number, since it uses as much as digits as its factorization.

1231344040181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 1231344040181 in words is "one trillion, two hundred thirty-one billion, three hundred forty-four million, forty thousand, one hundred eighty-one".