44331020021 has 4 divisors (see below), whose sum is σ = 44331463200. Its totient is φ = 44330576844.

The previous prime is 44331020011. The next prime is 44331020033. The reversal of 44331020021 is 12002013344.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44331020021 is a prime.

It is a super-2 number, since 2×44331020021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 44331019975 and 44331020002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44331020011) 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, 7190 + ... + 297848.

It is an arithmetic number, because the mean of its divisors is an integer number (11082865800).

Almost surely, 2^44331020021 is an apocalyptic number.

It is an amenable number.

44331020021 is a deficient number, since it is larger than the sum of its proper divisors (443179).

44331020021 is a wasteful number, since it uses less digits than its factorization.

44331020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443178.

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

Adding to 44331020021 its reverse (12002013344), we get a palindrome (56333033365).

The spelling of 44331020021 in words is "forty-four billion, three hundred thirty-one million, twenty thousand, twenty-one".