44402206021 has 2 divisors, whose sum is σ = 44402206022. Its totient is φ = 44402206020.

The previous prime is 44402206019. The next prime is 44402206027. The reversal of 44402206021 is 12060220444.

It is a happy number.

44402206021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43697303521 + 704902500 = 209039^2 + 26550^2 .

It is a cyclic number.

It is not a de Polignac number, because 44402206021 - 2¹ = 44402206019 is a prime.

Together with 44402206019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44402206027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22201103010 + 22201103011.

It is an arithmetic number, because the mean of its divisors is an integer number (22201103011).

Almost surely, 2^44402206021 is an apocalyptic number.

It is an amenable number.

44402206021 is a deficient number, since it is larger than the sum of its proper divisors (1).

44402206021 is an equidigital number, since it uses as much as digits as its factorization.

44402206021 is an evil number, because the sum of its binary digits is even.

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

Adding to 44402206021 its reverse (12060220444), we get a palindrome (56462426465).

The spelling of 44402206021 in words is "forty-four billion, four hundred two million, two hundred six thousand, twenty-one".