2111660848821 has 16 divisors (see below), whose sum is σ = 2892656245184. Its totient is φ = 1369246322304.

The previous prime is 2111660848813. The next prime is 2111660848849. The reversal of 2111660848821 is 1288480661112.

It is not a de Polignac number, because 2111660848821 - 2³ = 2111660848813 is a prime.

It is a super-2 number, since 2×2111660848821² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111660848861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3012235 + ... + 3646488.

It is an arithmetic number, because the mean of its divisors is an integer number (180791015324).

Almost surely, 2^{2111660848821} is an apocalyptic number.

It is an amenable number.

2111660848821 is a deficient number, since it is larger than the sum of its proper divisors (780995396363).

2111660848821 is a wasteful number, since it uses less digits than its factorization.

2111660848821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6661620.

The product of its (nonzero) digits is 294912, while the sum is 48.

The spelling of 2111660848821 in words is "two trillion, one hundred eleven billion, six hundred sixty million, eight hundred forty-eight thousand, eight hundred twenty-one".