1031130012181 has 2 divisors, whose sum is σ = 1031130012182. Its totient is φ = 1031130012180.

The previous prime is 1031130012173. The next prime is 1031130012259. The reversal of 1031130012181 is 1812100311301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 977310188100 + 53819824081 = 988590^2 + 231991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031130012181 - 2³ = 1031130012173 is a prime.

It is a super-2 number, since 2×1031130012181² (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 (1031130012881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515565006090 + 515565006091.

It is an arithmetic number, because the mean of its divisors is an integer number (515565006091).

Almost surely, 2^{1031130012181} is an apocalyptic number.

It is an amenable number.

1031130012181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031130012181 is an equidigital number, since it uses as much as digits as its factorization.

1031130012181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 1031130012181 its reverse (1812100311301), we get a palindrome (2843230323482).

The spelling of 1031130012181 in words is "one trillion, thirty-one billion, one hundred thirty million, twelve thousand, one hundred eighty-one".