2011121100999 has 6 divisors (see below), whose sum is σ = 2904952701456. Its totient is φ = 1340747400660.

The previous prime is 2011121100889. The next prime is 2011121101001. The reversal of 2011121100999 is 9990011211102.

It is not a de Polignac number, because 2011121100999 - 2⁸ = 2011121100743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011121100799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111728950047 + ... + 111728950064.

It is an arithmetic number, because the mean of its divisors is an integer number (484158783576).

Almost surely, 2^{2011121100999} is an apocalyptic number.

2011121100999 is a deficient number, since it is larger than the sum of its proper divisors (893831600457).

2011121100999 is a wasteful number, since it uses less digits than its factorization.

2011121100999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223457900117 (or 223457900114 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 36.

The spelling of 2011121100999 in words is "two trillion, eleven billion, one hundred twenty-one million, one hundred thousand, nine hundred ninety-nine".