9995641121 has 2 divisors, whose sum is σ = 9995641122. Its totient is φ = 9995641120.

The previous prime is 9995641069. The next prime is 9995641127. The reversal of 9995641121 is 1211465999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8711422225 + 1284218896 = 93335^2 + 35836^2 .

It is an emirp because it is prime and its reverse (1211465999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9995641121 - 2³⁰ = 8921899297 is a prime.

It is a super-2 number, since 2×9995641121² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9995641127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4997820560 + 4997820561.

It is an arithmetic number, because the mean of its divisors is an integer number (4997820561).

Almost surely, 2^9995641121 is an apocalyptic number.

It is an amenable number.

9995641121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9995641121 is an equidigital number, since it uses as much as digits as its factorization.

9995641121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 47.

The square root of 9995641121 is about 99978.2032295040. The cubic root of 9995641121 is about 2154.1216138679.

The spelling of 9995641121 in words is "nine billion, nine hundred ninety-five million, six hundred forty-one thousand, one hundred twenty-one".