4404545312121 has 24 divisors (see below), whose sum is σ = 6739983608904. Its totient is φ = 2762151068160.

The previous prime is 4404545312113. The next prime is 4404545312129. The reversal of 4404545312121 is 1212135454044.

4404545312121 is a `hidden beast` number, since 4 + 40 + 4 + 545 + 31 + 21 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (4404545312113) and next prime (4404545312129).

It can be written as a sum of positive squares in 4 ways, for example, as 18302031225 + 4386243280896 = 135285^2 + 2094336^2 .

It is not a de Polignac number, because 4404545312121 - 2³ = 4404545312113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4404545312129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7449786 + ... + 8019251.

It is an arithmetic number, because the mean of its divisors is an integer number (280832650371).

Almost surely, 2^{4404545312121} is an apocalyptic number.

It is an amenable number.

4404545312121 is a deficient number, since it is larger than the sum of its proper divisors (2335438296783).

4404545312121 is a wasteful number, since it uses less digits than its factorization.

4404545312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15470921 (or 15470918 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

It can be divided in two parts, 440454 and 5312121, that added together give a palindrome (5752575).

The spelling of 4404545312121 in words is "four trillion, four hundred four billion, five hundred forty-five million, three hundred twelve thousand, one hundred twenty-one".