201044443021 has 4 divisors (see below), whose sum is σ = 201198265632. Its totient is φ = 200890620412.

The previous prime is 201044442857. The next prime is 201044443049. The reversal of 201044443021 is 120344440102.

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 a cyclic number.

It is not a de Polignac number, because 201044443021 - 2²¹ = 201042345869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201044443081) 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, 76909345 + ... + 76911958.

It is an arithmetic number, because the mean of its divisors is an integer number (50299566408).

Almost surely, 2^201044443021 is an apocalyptic number.

It is an amenable number.

201044443021 is a deficient number, since it is larger than the sum of its proper divisors (153822611).

201044443021 is a wasteful number, since it uses less digits than its factorization.

201044443021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153822610.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 201044443021 its reverse (120344440102), we get a palindrome (321388883123).

The spelling of 201044443021 in words is "two hundred one billion, forty-four million, four hundred forty-three thousand, twenty-one".