201021430044 has 12 divisors (see below), whose sum is σ = 469050003464. Its totient is φ = 67007143344.

The previous prime is 201021430033. The next prime is 201021430067. The reversal of 201021430044 is 440034120102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 201021430044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8375892907 + ... + 8375892930.

Almost surely, 2^201021430044 is an apocalyptic number.

It is an amenable number.

201021430044 is an abundant number, since it is smaller than the sum of its proper divisors (268028573420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201021430044 is a wasteful number, since it uses less digits than its factorization.

201021430044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16751785844 (or 16751785842 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 201021430044 its reverse (440034120102), we get a palindrome (641055550146).

The spelling of 201021430044 in words is "two hundred one billion, twenty-one million, four hundred thirty thousand, forty-four".