99121211 has 8 divisors (see below), whose sum is σ = 113908704. Its totient is φ = 84490560.

The previous prime is 99121201. The next prime is 99121219. The reversal of 99121211 is 11212199.

99121211 = 3760² + 3761² + ... + 3766².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99121211 - 2¹⁰ = 99120187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99121219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37850 + ... + 40383.

It is an arithmetic number, because the mean of its divisors is an integer number (14238588).

Almost surely, 2^99121211 is an apocalyptic number.

99121211 is a deficient number, since it is larger than the sum of its proper divisors (14787493).

99121211 is a wasteful number, since it uses less digits than its factorization.

99121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78421.

The product of its digits is 324, while the sum is 26.

The square root of 99121211 is about 9955.9635897285. The cubic root of 99121211 is about 462.7952218871.

The spelling of 99121211 in words is "ninety-nine million, one hundred twenty-one thousand, two hundred eleven".