99901211 has 4 divisors (see below), whose sum is σ = 99925752. Its totient is φ = 99876672.

The previous prime is 99901159. The next prime is 99901253. The reversal of 99901211 is 11210999.

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

It is a cyclic number.

It is not a de Polignac number, because 99901211 - 2²² = 95706907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99903211) 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 3 ways as a sum of consecutive naturals, for example, 4541 + ... + 14846.

It is an arithmetic number, because the mean of its divisors is an integer number (24981438).

Almost surely, 2^99901211 is an apocalyptic number.

99901211 is a deficient number, since it is larger than the sum of its proper divisors (24541).

99901211 is a wasteful number, since it uses less digits than its factorization.

99901211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24540.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 99901211 is about 9995.0593294887. The cubic root of 99901211 is about 464.0059870289.

The spelling of 99901211 in words is "ninety-nine million, nine hundred one thousand, two hundred eleven".