2031143111161 has 2 divisors, whose sum is σ = 2031143111162. Its totient is φ = 2031143111160.

The previous prime is 2031143111117. The next prime is 2031143111227. The reversal of 2031143111161 is 1611113411302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2017081657600 + 14061453561 = 1420240^2 + 118581^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031143111161 - 2⁹ = 2031143110649 is a prime.

It is not a weakly prime, because it can be changed into another prime (2031143111561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015571555580 + 1015571555581.

It is an arithmetic number, because the mean of its divisors is an integer number (1015571555581).

Almost surely, 2^{2031143111161} is an apocalyptic number.

It is an amenable number.

2031143111161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031143111161 is an equidigital number, since it uses as much as digits as its factorization.

2031143111161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

Adding to 2031143111161 its reverse (1611113411302), we get a palindrome (3642256522463).

The spelling of 2031143111161 in words is "two trillion, thirty-one billion, one hundred forty-three million, one hundred eleven thousand, one hundred sixty-one".