2113646621243 has 8 divisors (see below), whose sum is σ = 2117302839600. Its totient is φ = 2109991183488.

The previous prime is 2113646621227. The next prime is 2113646621293. The reversal of 2113646621243 is 3421266463112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2113646621243 - 2⁴ = 2113646621227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2113646621243.

It is not an unprimeable number, because it can be changed into a prime (2113646621293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5361455 + ... + 5742167.

It is an arithmetic number, because the mean of its divisors is an integer number (264662854950).

Almost surely, 2^{2113646621243} is an apocalyptic number.

2113646621243 is a deficient number, since it is larger than the sum of its proper divisors (3656218357).

2113646621243 is an equidigital number, since it uses as much as digits as its factorization.

2113646621243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390301.

The product of its digits is 248832, while the sum is 41.

The spelling of 2113646621243 in words is "two trillion, one hundred thirteen billion, six hundred forty-six million, six hundred twenty-one thousand, two hundred forty-three".