2656216231121 has 4 divisors (see below), whose sum is σ = 2664595462452. Its totient is φ = 2647836999792.

The previous prime is 2656216231103. The next prime is 2656216231127. The reversal of 2656216231121 is 1211326126562.

2656216231121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1096552442896 + 1559663788225 = 1047164^2 + 1248865^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656216231121 - 2¹⁴ = 2656216214737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2656216231127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4189615190 + ... + 4189615823.

It is an arithmetic number, because the mean of its divisors is an integer number (666148865613).

Almost surely, 2^{2656216231121} is an apocalyptic number.

It is an amenable number.

2656216231121 is a deficient number, since it is larger than the sum of its proper divisors (8379231331).

2656216231121 is an equidigital number, since it uses as much as digits as its factorization.

2656216231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8379231330.

The product of its digits is 51840, while the sum is 38.

The spelling of 2656216231121 in words is "two trillion, six hundred fifty-six billion, two hundred sixteen million, two hundred thirty-one thousand, one hundred twenty-one".