201324013021 has 4 divisors (see below), whose sum is σ = 206234354844. Its totient is φ = 196413671200.

The previous prime is 201324013001. The next prime is 201324013043. The reversal of 201324013021 is 120310423102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 111392400025 + 89931612996 = 333755^2 + 299886^2 .

It is a cyclic number.

It is not a de Polignac number, because 201324013021 - 2¹¹ = 201324010973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201324013021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201324013001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2455170850 + ... + 2455170931.

It is an arithmetic number, because the mean of its divisors is an integer number (51558588711).

Almost surely, 2^201324013021 is an apocalyptic number.

It is an amenable number.

201324013021 is a deficient number, since it is larger than the sum of its proper divisors (4910341823).

201324013021 is an equidigital number, since it uses as much as digits as its factorization.

201324013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4910341822.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201324013021 its reverse (120310423102), we get a palindrome (321634436123).

The spelling of 201324013021 in words is "two hundred one billion, three hundred twenty-four million, thirteen thousand, twenty-one".