244020140121 has 4 divisors (see below), whose sum is σ = 325360186832. Its totient is φ = 162680093412.

The previous prime is 244020140101. The next prime is 244020140129. The reversal of 244020140121 is 121041020442.

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.

It is not a de Polignac number, because 244020140121 - 2⁹ = 244020139609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (244020140129) 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, 40670023351 + ... + 40670023356.

It is an arithmetic number, because the mean of its divisors is an integer number (81340046708).

Almost surely, 2^244020140121 is an apocalyptic number.

It is an amenable number.

244020140121 is a deficient number, since it is larger than the sum of its proper divisors (81340046711).

244020140121 is an equidigital number, since it uses as much as digits as its factorization.

244020140121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81340046710.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 244020140121 its reverse (121041020442), we get a palindrome (365061160563).

The spelling of 244020140121 in words is "two hundred forty-four billion, twenty million, one hundred forty thousand, one hundred twenty-one".