99124855281 has 9 divisors (see below), whose sum is σ = 143181710841. Its totient is φ = 66082607172.

The previous prime is 99124855273. The next prime is 99124855289. The reversal of 99124855281 is 18255842199.

The square root of 99124855281 is 314841.

It is a perfect power (a square), and thus also a powerful number.

99124855281 is a `hidden beast` number, since 9 + 9 + 1 + 2 + 4 + 8 + 552 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (99124855273) and next prime (99124855289).

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 99124855281 - 2³ = 99124855273 is a prime.

It is a super-2 number, since 2×99124855281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99124855289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 892050 + ... + 996996.

Almost surely, 2^99124855281 is an apocalyptic number.

99124855281 is the 314841-st square number.

99124855281 is the 157421-st centered octagonal number.

It is an amenable number.

99124855281 is a deficient number, since it is larger than the sum of its proper divisors (44056855560).

99124855281 is an frugal number, since it uses more digits than its factorization.

99124855281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209900 (or 104950 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 54.

It can be divided in two parts, 991248 and 55281, that added together give a square (1046529 = 1023²).

The spelling of 99124855281 in words is "ninety-nine billion, one hundred twenty-four million, eight hundred fifty-five thousand, two hundred eighty-one".