2101324121321 has 4 divisors (see below), whose sum is σ = 2117869980672. Its totient is φ = 2084778261972.

The previous prime is 2101324121297. The next prime is 2101324121327. The reversal of 2101324121321 is 1231214231012.

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 a cyclic number.

It is not a de Polignac number, because 2101324121321 - 2¹⁰ = 2101324120297 is a prime.

It is a super-3 number, since 3×2101324121321³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101324121327) 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 3 ways as a sum of consecutive naturals, for example, 8272929485 + ... + 8272929738.

It is an arithmetic number, because the mean of its divisors is an integer number (529467495168).

Almost surely, 2^{2101324121321} is an apocalyptic number.

It is an amenable number.

2101324121321 is a deficient number, since it is larger than the sum of its proper divisors (16545859351).

2101324121321 is a wasteful number, since it uses less digits than its factorization.

2101324121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16545859350.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 2101324121321 its reverse (1231214231012), we get a palindrome (3332538352333).

The spelling of 2101324121321 in words is "two trillion, one hundred one billion, three hundred twenty-four million, one hundred twenty-one thousand, three hundred twenty-one".