2101169119681 has 2 divisors, whose sum is σ = 2101169119682. Its totient is φ = 2101169119680.

The previous prime is 2101169119661. The next prime is 2101169119711. The reversal of 2101169119681 is 1869119611012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1468420462656 + 632748657025 = 1211784^2 + 795455^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101169119681 - 2²¹ = 2101167022529 is a prime.

It is a super-2 number, since 2×2101169119681² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2101169119661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050584559840 + 1050584559841.

It is an arithmetic number, because the mean of its divisors is an integer number (1050584559841).

Almost surely, 2^{2101169119681} is an apocalyptic number.

It is an amenable number.

2101169119681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101169119681 is an equidigital number, since it uses as much as digits as its factorization.

2101169119681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 46.

The spelling of 2101169119681 in words is "two trillion, one hundred one billion, one hundred sixty-nine million, one hundred nineteen thousand, six hundred eighty-one".