42444231021 has 6 divisors (see below), whose sum is σ = 61308333710. Its totient is φ = 28296154008.

The previous prime is 42444230999. The next prime is 42444231029. The reversal of 42444231021 is 12013244424.

42444231021 is a `hidden beast` number, since 424 + 4 + 4 + 231 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 41937305796 + 506925225 = 204786^2 + 22515^2 .

It is not a de Polignac number, because 42444231021 - 2⁷ = 42444230893 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 (42444231029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2358012826 + ... + 2358012843.

Almost surely, 2^42444231021 is an apocalyptic number.

It is an amenable number.

42444231021 is a deficient number, since it is larger than the sum of its proper divisors (18864102689).

42444231021 is a wasteful number, since it uses less digits than its factorization.

42444231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4716025675 (or 4716025672 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 42444231021 its reverse (12013244424), we get a palindrome (54457475445).

The spelling of 42444231021 in words is "forty-two billion, four hundred forty-four million, two hundred thirty-one thousand, twenty-one".