2116444000021 has 16 divisors (see below), whose sum is σ = 2288395211760. Its totient is φ = 1945809815040.

The previous prime is 2116443999991. The next prime is 2116444000057. The reversal of 2116444000021 is 1200004446112.

It can be written as a sum of positive squares in 8 ways, for example, as 51431889796 + 2065012110225 = 226786^2 + 1437015^2 .

It is not a de Polignac number, because 2116444000021 - 2⁷ = 2116443999893 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 2116444000021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116444000091) 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, 4789191 + ... + 5212411.

It is an arithmetic number, because the mean of its divisors is an integer number (143024700735).

Almost surely, 2^{2116444000021} is an apocalyptic number.

It is an amenable number.

2116444000021 is a deficient number, since it is larger than the sum of its proper divisors (171951211739).

2116444000021 is a wasteful number, since it uses less digits than its factorization.

2116444000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424776.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 2116444000021 its reverse (1200004446112), we get a palindrome (3316448446133).

The spelling of 2116444000021 in words is "two trillion, one hundred sixteen billion, four hundred forty-four million, twenty-one", and thus it is an aban number.