1200011021099 has 4 divisors (see below), whose sum is σ = 1309102932120. Its totient is φ = 1090919110080.

The previous prime is 1200011021057. The next prime is 1200011021119. The reversal of 1200011021099 is 9901201100021.

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-1200011021099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200011021009) 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, 54545955494 + ... + 54545955515.

It is an arithmetic number, because the mean of its divisors is an integer number (327275733030).

Almost surely, 2^{1200011021099} is an apocalyptic number.

1200011021099 is a deficient number, since it is larger than the sum of its proper divisors (109091911021).

1200011021099 is a wasteful number, since it uses less digits than its factorization.

1200011021099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109091911020.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 1200011021099 in words is "one trillion, two hundred billion, eleven million, twenty-one thousand, ninety-nine".