2113646020261 has 4 divisors (see below), whose sum is σ = 2113649373024. Its totient is φ = 2113642667500.

The previous prime is 2113646020253. The next prime is 2113646020301. The reversal of 2113646020261 is 1620206463112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2113646020261 - 2³ = 2113646020253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113646020361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413755 + ... + 2097256.

It is an arithmetic number, because the mean of its divisors is an integer number (528412343256).

Almost surely, 2^{2113646020261} is an apocalyptic number.

It is an amenable number.

2113646020261 is a deficient number, since it is larger than the sum of its proper divisors (3352763).

2113646020261 is an equidigital number, since it uses as much as digits as its factorization.

2113646020261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352762.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 2113646020261 in words is "two trillion, one hundred thirteen billion, six hundred forty-six million, twenty thousand, two hundred sixty-one".