2100003212321 has 16 divisors (see below), whose sum is σ = 2526365798400. Its totient is φ = 1705234619088.

The previous prime is 2100003212269. The next prime is 2100003212327. The reversal of 2100003212321 is 1232123000012.

It is not a de Polignac number, because 2100003212321 - 2³⁴ = 2082823343137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2100003212321.

It is not an unprimeable number, because it can be changed into a prime (2100003212327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9662576 + ... + 9877518.

It is an arithmetic number, because the mean of its divisors is an integer number (157897862400).

Almost surely, 2^{2100003212321} is an apocalyptic number.

It is an amenable number.

2100003212321 is a deficient number, since it is larger than the sum of its proper divisors (426362586079).

2100003212321 is a wasteful number, since it uses less digits than its factorization.

2100003212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288428.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2100003212321 its reverse (1232123000012), we get a palindrome (3332126212333).

The spelling of 2100003212321 in words is "two trillion, one hundred billion, three million, two hundred twelve thousand, three hundred twenty-one".