2121001001323 has 2 divisors, whose sum is σ = 2121001001324. Its totient is φ = 2121001001322.

The previous prime is 2121001001291. The next prime is 2121001001377. The reversal of 2121001001323 is 3231001001212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121001001323 - 2⁵ = 2121001001291 is a prime.

It is a super-2 number, since 2×2121001001323² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121001001297 and 2121001001306.

It is not a weakly prime, because it can be changed into another prime (2121001031323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060500500661 + 1060500500662.

It is an arithmetic number, because the mean of its divisors is an integer number (1060500500662).

Almost surely, 2^{2121001001323} is an apocalyptic number.

2121001001323 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121001001323 is an equidigital number, since it uses as much as digits as its factorization.

2121001001323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 2121001001323 its reverse (3231001001212), we get a palindrome (5352002002535).

The spelling of 2121001001323 in words is "two trillion, one hundred twenty-one billion, one million, one thousand, three hundred twenty-three".