21020443301 has 32 divisors (see below), whose sum is σ = 25020890496. Its totient is φ = 17408160000.

The previous prime is 21020443273. The next prime is 21020443303. The reversal of 21020443301 is 10334402012.

It is a de Polignac number, because none of the positive numbers 2^k-21020443301 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 (21020443303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4778435 + ... + 4782831.

It is an arithmetic number, because the mean of its divisors is an integer number (781902828).

Almost surely, 2^21020443301 is an apocalyptic number.

It is an amenable number.

21020443301 is a deficient number, since it is larger than the sum of its proper divisors (4000447195).

21020443301 is a wasteful number, since it uses less digits than its factorization.

21020443301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21020443301 its reverse (10334402012), we get a palindrome (31354845313).

The spelling of 21020443301 in words is "twenty-one billion, twenty million, four hundred forty-three thousand, three hundred one".