2100320412321 has 4 divisors (see below), whose sum is σ = 2800427216432. Its totient is φ = 1400213608212.

The previous prime is 2100320412271. The next prime is 2100320412341. The reversal of 2100320412321 is 1232140230012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2100320412321 - 2²⁶ = 2100253303457 is a prime.

It is a super-2 number, since 2×2100320412321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100320412341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350053402051 + ... + 350053402056.

It is an arithmetic number, because the mean of its divisors is an integer number (700106804108).

Almost surely, 2^{2100320412321} is an apocalyptic number.

It is an amenable number.

2100320412321 is a deficient number, since it is larger than the sum of its proper divisors (700106804111).

2100320412321 is an equidigital number, since it uses as much as digits as its factorization.

2100320412321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700106804110.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2100320412321 its reverse (1232140230012), we get a palindrome (3332460642333).

The spelling of 2100320412321 in words is "two trillion, one hundred billion, three hundred twenty million, four hundred twelve thousand, three hundred twenty-one".