201031420321 has 4 divisors (see below), whose sum is σ = 201265996932. Its totient is φ = 200796843712.

The previous prime is 201031420319. The next prime is 201031420409. The reversal of 201031420321 is 123024130102.

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 178283239696 + 22748180625 = 422236^2 + 150825^2 .

It is a cyclic number.

It is not a de Polignac number, because 201031420321 - 2¹ = 201031420319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201031420301) 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, 117287020 + ... + 117288733.

It is an arithmetic number, because the mean of its divisors is an integer number (50316499233).

Almost surely, 2^201031420321 is an apocalyptic number.

It is an amenable number.

201031420321 is a deficient number, since it is larger than the sum of its proper divisors (234576611).

201031420321 is an equidigital number, since it uses as much as digits as its factorization.

201031420321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234576610.

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

Adding to 201031420321 its reverse (123024130102), we get a palindrome (324055550423).

The spelling of 201031420321 in words is "two hundred one billion, thirty-one million, four hundred twenty thousand, three hundred twenty-one".