201922019091 has 24 divisors (see below), whose sum is σ = 330632549520. Its totient is φ = 117719718336.

The previous prime is 201922019069. The next prime is 201922019191. The reversal of 201922019091 is 190910229102.

It is not a de Polignac number, because 201922019091 - 2⁹ = 201922018579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201922019041) 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 23 ways as a sum of consecutive naturals, for example, 45414336 + ... + 45418781.

It is an arithmetic number, because the mean of its divisors is an integer number (13776356230).

Almost surely, 2^201922019091 is an apocalyptic number.

201922019091 is a deficient number, since it is larger than the sum of its proper divisors (128710530429).

201922019091 is a wasteful number, since it uses less digits than its factorization.

201922019091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90833155 (or 90833152 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 201922019091 in words is "two hundred one billion, nine hundred twenty-two million, nineteen thousand, ninety-one".