2123013212321 has 16 divisors (see below), whose sum is σ = 2229160876800. Its totient is φ = 2019065989248.

The previous prime is 2123013212311. The next prime is 2123013212323. The reversal of 2123013212321 is 1232123103212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123013212321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123013212323) 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, 34805576 + ... + 34866518.

It is an arithmetic number, because the mean of its divisors is an integer number (139322554800).

Almost surely, 2^{2123013212321} is an apocalyptic number.

It is an amenable number.

2123013212321 is a deficient number, since it is larger than the sum of its proper divisors (106147664479).

2123013212321 is a wasteful number, since it uses less digits than its factorization.

2123013212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78968.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2123013212321 its reverse (1232123103212), we get a palindrome (3355136315533).

The spelling of 2123013212321 in words is "two trillion, one hundred twenty-three billion, thirteen million, two hundred twelve thousand, three hundred twenty-one".