99212571 has 12 divisors (see below), whose sum is σ = 145736760. Its totient is φ = 65020320.

The previous prime is 99212569. The next prime is 99212599. The reversal of 99212571 is 17521299.

It is not a de Polignac number, because 99212571 - 2¹ = 99212569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99212521) 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 11 ways as a sum of consecutive naturals, for example, 92890 + ... + 93951.

It is an arithmetic number, because the mean of its divisors is an integer number (12144730).

Almost surely, 2^99212571 is an apocalyptic number.

99212571 is a deficient number, since it is larger than the sum of its proper divisors (46524189).

99212571 is a wasteful number, since it uses less digits than its factorization.

99212571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186906 (or 186903 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 99212571 is about 9960.5507377855. The cubic root of 99212571 is about 462.9373643124.

The spelling of 99212571 in words is "ninety-nine million, two hundred twelve thousand, five hundred seventy-one".