2123312121321 has 8 divisors (see below), whose sum is σ = 2833058467680. Its totient is φ = 1414553594592.

The previous prime is 2123312121313. The next prime is 2123312121341. The reversal of 2123312121321 is 1231212133212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2123312121321 - 2³ = 2123312121313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123312121291 and 2123312121300.

It is not an unprimeable number, because it can be changed into a prime (2123312121341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246949891 + ... + 246958488.

It is an arithmetic number, because the mean of its divisors is an integer number (354132308460).

Almost surely, 2^{2123312121321} is an apocalyptic number.

It is an amenable number.

2123312121321 is a deficient number, since it is larger than the sum of its proper divisors (709746346359).

2123312121321 is a wasteful number, since it uses less digits than its factorization.

2123312121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493909815.

The product of its digits is 864, while the sum is 24.

Adding to 2123312121321 its reverse (1231212133212), we get a palindrome (3354524254533).

The spelling of 2123312121321 in words is "two trillion, one hundred twenty-three billion, three hundred twelve million, one hundred twenty-one thousand, three hundred twenty-one".