244202942821 has 4 divisors (see below), whose sum is σ = 244276656652. Its totient is φ = 244129228992.

The previous prime is 244202942807. The next prime is 244202942827. The reversal of 244202942821 is 128249202442.

244202942821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 128249202442 = 2 ⋅64124601221.

It can be written as a sum of positive squares in 2 ways, for example, as 117587953921 + 126614988900 = 342911^2 + 355830^2 .

It is a cyclic number.

It is not a de Polignac number, because 244202942821 - 2⁹ = 244202942309 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 (244202942827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36851946 + ... + 36858571.

It is an arithmetic number, because the mean of its divisors is an integer number (61069164163).

Almost surely, 2^244202942821 is an apocalyptic number.

It is an amenable number.

244202942821 is a deficient number, since it is larger than the sum of its proper divisors (73713831).

244202942821 is an equidigital number, since it uses as much as digits as its factorization.

244202942821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73713830.

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 244202942821 in words is "two hundred forty-four billion, two hundred two million, nine hundred forty-two thousand, eight hundred twenty-one".