99999953211 has 4 divisors (see below), whose sum is σ = 133333270952. Its totient is φ = 66666635472.

The previous prime is 99999953203. The next prime is 99999953257. The reversal of 99999953211 is 11235999999.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 99999953211 - 2³ = 99999953203 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99999953611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16666658866 + ... + 16666658871.

It is an arithmetic number, because the mean of its divisors is an integer number (33333317738).

Almost surely, 2^99999953211 is an apocalyptic number.

99999953211 is a deficient number, since it is larger than the sum of its proper divisors (33333317741).

99999953211 is a wasteful number, since it uses less digits than its factorization.

99999953211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333317740.

The product of its digits is 15943230, while the sum is 66.

The spelling of 99999953211 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred fifty-three thousand, two hundred eleven".