1200011122191 has 32 divisors (see below), whose sum is σ = 1916281635840. Its totient is φ = 653091588864.

The previous prime is 1200011122183. The next prime is 1200011122213. The reversal of 1200011122191 is 1912211100021.

It is not a de Polignac number, because 1200011122191 - 2³ = 1200011122183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200011122181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5218996 + ... + 5444073.

It is an arithmetic number, because the mean of its divisors is an integer number (59883801120).

Almost surely, 2^{1200011122191} is an apocalyptic number.

1200011122191 is a deficient number, since it is larger than the sum of its proper divisors (716270513649).

1200011122191 is a wasteful number, since it uses less digits than its factorization.

1200011122191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10663335.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 1200011122191 in words is "one trillion, two hundred billion, eleven million, one hundred twenty-two thousand, one hundred ninety-one".