2113536212681 has 2 divisors, whose sum is σ = 2113536212682. Its totient is φ = 2113536212680.

The previous prime is 2113536212651. The next prime is 2113536212693. The reversal of 2113536212681 is 1862126353112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2057962393600 + 55573819081 = 1434560^2 + 235741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113536212681 is a prime.

It is a super-2 number, since 2×2113536212681² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2113536212651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056768106340 + 1056768106341.

It is an arithmetic number, because the mean of its divisors is an integer number (1056768106341).

Almost surely, 2^{2113536212681} is an apocalyptic number.

It is an amenable number.

2113536212681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113536212681 is an equidigital number, since it uses as much as digits as its factorization.

2113536212681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The spelling of 2113536212681 in words is "two trillion, one hundred thirteen billion, five hundred thirty-six million, two hundred twelve thousand, six hundred eighty-one".