1323545250021 has 4 divisors (see below), whose sum is σ = 1764727000032. Its totient is φ = 882363500012.

The previous prime is 1323545249987. The next prime is 1323545250029. The reversal of 1323545250021 is 1200525453231.

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 1323545250021 - 2¹⁹ = 1323544725733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323545250029) 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, 220590875001 + ... + 220590875006.

It is an arithmetic number, because the mean of its divisors is an integer number (441181750008).

Almost surely, 2^{1323545250021} is an apocalyptic number.

It is an amenable number.

1323545250021 is a deficient number, since it is larger than the sum of its proper divisors (441181750011).

1323545250021 is an equidigital number, since it uses as much as digits as its factorization.

1323545250021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441181750010.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 1323545250021 in words is "one trillion, three hundred twenty-three billion, five hundred forty-five million, two hundred fifty thousand, twenty-one".