122002020191 has 6 divisors (see below), whose sum is σ = 129600762240. Its totient is φ = 114825430496.

The previous prime is 122002020187. The next prime is 122002020229. The reversal of 122002020191 is 191020200221.

It is a happy number.

It is not a de Polignac number, because 122002020191 - 2² = 122002020187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122002020181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 211075871 + ... + 211076448.

It is an arithmetic number, because the mean of its divisors is an integer number (21600127040).

Almost surely, 2^122002020191 is an apocalyptic number.

122002020191 is a deficient number, since it is larger than the sum of its proper divisors (7598742049).

122002020191 is an equidigital number, since it uses as much as digits as its factorization.

122002020191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422152353 (or 422152336 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 122002020191 in words is "one hundred twenty-two billion, two million, twenty thousand, one hundred ninety-one".