1211000111099 has 4 divisors (see below), whose sum is σ = 1211118233136. Its totient is φ = 1210881989064.

The previous prime is 1211000111093. The next prime is 1211000111171. The reversal of 1211000111099 is 9901110001121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211000111099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211000111093) 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, 59045639 + ... + 59066144.

It is an arithmetic number, because the mean of its divisors is an integer number (302779558284).

Almost surely, 2^{1211000111099} is an apocalyptic number.

1211000111099 is a deficient number, since it is larger than the sum of its proper divisors (118122037).

1211000111099 is a wasteful number, since it uses less digits than its factorization.

1211000111099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118122036.

The product of its (nonzero) digits is 162, while the sum is 26.

The spelling of 1211000111099 in words is "one trillion, two hundred eleven billion, one hundred eleven thousand, ninety-nine".