20100202321 has 4 divisors (see below), whose sum is σ = 20100565044. Its totient is φ = 20099839600.

The previous prime is 20100202319. The next prime is 20100202337. The reversal of 20100202321 is 12320200102.

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 649995025 + 19450207296 = 25495^2 + 139464^2 .

It is a cyclic number.

It is not a de Polignac number, because 20100202321 - 2¹ = 20100202319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20100202351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78970 + ... + 215491.

It is an arithmetic number, because the mean of its divisors is an integer number (5025141261).

Almost surely, 2^20100202321 is an apocalyptic number.

It is an amenable number.

20100202321 is a deficient number, since it is larger than the sum of its proper divisors (362723).

20100202321 is an equidigital number, since it uses as much as digits as its factorization.

20100202321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362722.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20100202321 its reverse (12320200102), we get a palindrome (32420402423).

The spelling of 20100202321 in words is "twenty billion, one hundred million, two hundred two thousand, three hundred twenty-one".