2102123344321 has 96 divisors (see below), whose sum is σ = 2939969894400. Its totient is φ = 1461570739200.

The previous prime is 2102123344271. The next prime is 2102123344327. The reversal of 2102123344321 is 1234433212012.

It is not a de Polignac number, because 2102123344321 - 2¹⁹ = 2102122820033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2102123344321.

It is not an unprimeable number, because it can be changed into a prime (2102123344327) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 49186800 + ... + 49229518.

It is an arithmetic number, because the mean of its divisors is an integer number (30624686400).

Almost surely, 2^{2102123344321} is an apocalyptic number.

It is an amenable number.

2102123344321 is a deficient number, since it is larger than the sum of its proper divisors (837846550079).

2102123344321 is a wasteful number, since it uses less digits than its factorization.

2102123344321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42911 (or 42900 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 2102123344321 its reverse (1234433212012), we get a palindrome (3336556556333).

The spelling of 2102123344321 in words is "two trillion, one hundred two billion, one hundred twenty-three million, three hundred forty-four thousand, three hundred twenty-one".