99120111211 has 4 divisors (see below), whose sum is σ = 108131030424. Its totient is φ = 90109192000.

The previous prime is 99120111199. The next prime is 99120111241. The reversal of 99120111211 is 11211102199.

It is a happy number.

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 99120111211 - 2⁵ = 99120111179 is a prime.

It is a super-3 number, since 3×99120111211³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99120111211.

It is not an unprimeable number, because it can be changed into a prime (99120111241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4505459590 + ... + 4505459611.

It is an arithmetic number, because the mean of its divisors is an integer number (27032757606).

Almost surely, 2^99120111211 is an apocalyptic number.

99120111211 is a deficient number, since it is larger than the sum of its proper divisors (9010919213).

99120111211 is a wasteful number, since it uses less digits than its factorization.

99120111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9010919212.

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 99120111211 in words is "ninety-nine billion, one hundred twenty million, one hundred eleven thousand, two hundred eleven".