2143212100321 has 16 divisors (see below), whose sum is σ = 2337538046400. Its totient is φ = 1958337321408.

The previous prime is 2143212100277. The next prime is 2143212100339. The reversal of 2143212100321 is 1230012123412.

It is a cyclic number.

It is not a de Polignac number, because 2143212100321 - 2²⁷ = 2143077882593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2143212100292 and 2143212100301.

It is not an unprimeable number, because it can be changed into a prime (2143212100361) 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, 17977146 + ... + 18095971.

It is an arithmetic number, because the mean of its divisors is an integer number (146096127900).

Almost surely, 2^{2143212100321} is an apocalyptic number.

It is an amenable number.

2143212100321 is a deficient number, since it is larger than the sum of its proper divisors (194325946079).

2143212100321 is a wasteful number, since it uses less digits than its factorization.

2143212100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36073248.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2143212100321 its reverse (1230012123412), we get a palindrome (3373224223733).

The spelling of 2143212100321 in words is "two trillion, one hundred forty-three billion, two hundred twelve million, one hundred thousand, three hundred twenty-one".