2117231346861 has 6 divisors (see below), whose sum is σ = 3058223056590. Its totient is φ = 1411487564568.

The previous prime is 2117231346829. The next prime is 2117231346913. The reversal of 2117231346861 is 1686431327112.

2117231346861 is a `hidden beast` number, since 2 + 1 + 17 + 231 + 346 + 8 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1441044189225 + 676187157636 = 1200435^2 + 822306^2 .

It is not a de Polignac number, because 2117231346861 - 2⁵ = 2117231346829 is a prime.

It is a super-2 number, since 2×2117231346861² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117231356861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117623963706 + ... + 117623963723.

It is an arithmetic number, because the mean of its divisors is an integer number (509703842765).

Almost surely, 2^{2117231346861} is an apocalyptic number.

It is an amenable number.

2117231346861 is a deficient number, since it is larger than the sum of its proper divisors (940991709729).

2117231346861 is a wasteful number, since it uses less digits than its factorization.

2117231346861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235247927435 (or 235247927432 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The spelling of 2117231346861 in words is "two trillion, one hundred seventeen billion, two hundred thirty-one million, three hundred forty-six thousand, eight hundred sixty-one".