201144465021 has 4 divisors (see below), whose sum is σ = 268192620032. Its totient is φ = 134096310012.

The previous prime is 201144465019. The next prime is 201144465089. The reversal of 201144465021 is 120564441102.

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 not a de Polignac number, because 201144465021 - 2¹ = 201144465019 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 201144465021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201144467021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33524077501 + ... + 33524077506.

It is an arithmetic number, because the mean of its divisors is an integer number (67048155008).

Almost surely, 2^201144465021 is an apocalyptic number.

It is an amenable number.

201144465021 is a deficient number, since it is larger than the sum of its proper divisors (67048155011).

201144465021 is an equidigital number, since it uses as much as digits as its factorization.

201144465021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67048155010.

The product of its (nonzero) digits is 7680, while the sum is 30.

The spelling of 201144465021 in words is "two hundred one billion, one hundred forty-four million, four hundred sixty-five thousand, twenty-one".