1211111010199 has 4 divisors (see below), whose sum is σ = 1211127997464. Its totient is φ = 1211094022936.

The previous prime is 1211111010169. The next prime is 1211111010203. The reversal of 1211111010199 is 9910101111121.

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 1211111010199 - 2⁵ = 1211111010167 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 (1211111010139) 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, 8386237 + ... + 8529430.

It is an arithmetic number, because the mean of its divisors is an integer number (302781999366).

Almost surely, 2^{1211111010199} is an apocalyptic number.

1211111010199 is a deficient number, since it is larger than the sum of its proper divisors (16987265).

1211111010199 is an equidigital number, since it uses as much as digits as its factorization.

1211111010199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16987264.

The product of its (nonzero) digits is 162, while the sum is 28.

The spelling of 1211111010199 in words is "one trillion, two hundred eleven billion, one hundred eleven million, ten thousand, one hundred ninety-nine".