9444552121 has 4 divisors (see below), whose sum is σ = 9664192912. Its totient is φ = 9224911332.

The previous prime is 9444552109. The next prime is 9444552127. The reversal of 9444552121 is 1212554449.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1212554449 = 8389 ⋅144541.

It is a cyclic number.

It is not a de Polignac number, because 9444552121 - 2¹⁵ = 9444519353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9444552127) 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, 109820331 + ... + 109820416.

It is an arithmetic number, because the mean of its divisors is an integer number (2416048228).

Almost surely, 2^9444552121 is an apocalyptic number.

It is an amenable number.

9444552121 is a deficient number, since it is larger than the sum of its proper divisors (219640791).

9444552121 is a wasteful number, since it uses less digits than its factorization.

9444552121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219640790.

The product of its digits is 57600, while the sum is 37.

The square root of 9444552121 is about 97183.0855704839. The cubic root of 9444552121 is about 2113.7832681814.

The spelling of 9444552121 in words is "nine billion, four hundred forty-four million, five hundred fifty-two thousand, one hundred twenty-one".