44142320000021 has 4 divisors (see below), whose sum is σ = 44149612641132. Its totient is φ = 44135027358912.

The previous prime is 44142319999997. The next prime is 44142320000041. The reversal of 44142320000021 is 12000002324144.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4165215664996 + 39977104335025 = 2040886^2 + 6322745^2 .

It is a cyclic number.

It is not a de Polignac number, because 44142320000021 - 2¹⁸ = 44142319737877 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 (44142320000041) 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, 3646311476 + ... + 3646323581.

It is an arithmetic number, because the mean of its divisors is an integer number (11037403160283).

Almost surely, 2^{44142320000021} is an apocalyptic number.

It is an amenable number.

44142320000021 is a deficient number, since it is larger than the sum of its proper divisors (7292641111).

44142320000021 is an equidigital number, since it uses as much as digits as its factorization.

44142320000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7292641110.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 44142320000021 its reverse (12000002324144), we get a palindrome (56142322324165).

The spelling of 44142320000021 in words is "forty-four trillion, one hundred forty-two billion, three hundred twenty million, twenty-one", and thus it is an aban number.