111211099999 has 8 divisors (see below), whose sum is σ = 113619660480. Its totient is φ = 108804304896.

The previous prime is 111211099957. The next prime is 111211100023. The reversal of 111211099999 is 999990112111.

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

It is a cyclic number.

It is not a de Polignac number, because 111211099999 - 2¹⁷ = 111210968927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211099949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313594 + ... + 566359.

It is an arithmetic number, because the mean of its divisors is an integer number (14202457560).

Almost surely, 2^111211099999 is an apocalyptic number.

111211099999 is a deficient number, since it is larger than the sum of its proper divisors (2408560481).

111211099999 is an equidigital number, since it uses as much as digits as its factorization.

111211099999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882689.

The product of its (nonzero) digits is 118098, while the sum is 52.

The spelling of 111211099999 in words is "one hundred eleven billion, two hundred eleven million, ninety-nine thousand, nine hundred ninety-nine".