121200211191 has 16 divisors (see below), whose sum is σ = 163250045280. Its totient is φ = 79975747200.

The previous prime is 121200211163. The next prime is 121200211193. The reversal of 121200211191 is 191112002121.

It is not a de Polignac number, because 121200211191 - 2¹⁵ = 121200178423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200211193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 962725 + ... + 1081313.

It is an arithmetic number, because the mean of its divisors is an integer number (10203127830).

Almost surely, 2^121200211191 is an apocalyptic number.

121200211191 is a deficient number, since it is larger than the sum of its proper divisors (42049834089).

121200211191 is a wasteful number, since it uses less digits than its factorization.

121200211191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122066.

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

The spelling of 121200211191 in words is "one hundred twenty-one billion, two hundred million, two hundred eleven thousand, one hundred ninety-one".