202123313320009 has 4 divisors (see below), whose sum is σ = 204892125831316. Its totient is φ = 199354500808704.

The previous prime is 202123313319971. The next prime is 202123313320013. The reversal of 202123313320009 is 900023313321202.

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 122263264081984 + 79860049238025 = 11057272^2 + 8936445^2 .

It is a cyclic number.

It is not a de Polignac number, because 202123313320009 - 2³³ = 202114723385417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202123013320009) 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, 1384406255544 + ... + 1384406255689.

It is an arithmetic number, because the mean of its divisors is an integer number (51223031457829).

Almost surely, 2^{202123313320009} is an apocalyptic number.

It is an amenable number.

202123313320009 is a deficient number, since it is larger than the sum of its proper divisors (2768812511307).

202123313320009 is an equidigital number, since it uses as much as digits as its factorization.

202123313320009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768812511306.

The product of its (nonzero) digits is 11664, while the sum is 31.

The spelling of 202123313320009 in words is "two hundred two trillion, one hundred twenty-three billion, three hundred thirteen million, three hundred twenty thousand, nine".