2171318762141 has 2 divisors, whose sum is σ = 2171318762142. Its totient is φ = 2171318762140.

The previous prime is 2171318762023. The next prime is 2171318762161. The reversal of 2171318762141 is 1412678131712.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2164400016100 + 6918746041 = 1471190^2 + 83179^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171318762141 - 2³⁴ = 2154138892957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2171318762092 and 2171318762101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2171318762161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085659381070 + 1085659381071.

It is an arithmetic number, because the mean of its divisors is an integer number (1085659381071).

Almost surely, 2^{2171318762141} is an apocalyptic number.

It is an amenable number.

2171318762141 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171318762141 is an equidigital number, since it uses as much as digits as its factorization.

2171318762141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 44.

The spelling of 2171318762141 in words is "two trillion, one hundred seventy-one billion, three hundred eighteen million, seven hundred sixty-two thousand, one hundred forty-one".