220121111191 has 2 divisors, whose sum is σ = 220121111192. Its totient is φ = 220121111190.

The previous prime is 220121111183. The next prime is 220121111261. The reversal of 220121111191 is 191111121022.

It is a happy number.

220121111191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220121111191 - 2³ = 220121111183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220121111291) 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 as a sum of consecutive naturals, namely, 110060555595 + 110060555596.

It is an arithmetic number, because the mean of its divisors is an integer number (110060555596).

Almost surely, 2^220121111191 is an apocalyptic number.

220121111191 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121111191 is an equidigital number, since it uses as much as digits as its factorization.

220121111191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 220121111191 in words is "two hundred twenty billion, one hundred twenty-one million, one hundred eleven thousand, one hundred ninety-one".