201122020020 has 48 divisors (see below), whose sum is σ = 596267638848. Its totient is φ = 50477683200.

The previous prime is 201122020009. The next prime is 201122020079. The reversal of 201122020020 is 20020221102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 201122019978 and 201122020005.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 98588206 + ... + 98590245.

It is an arithmetic number, because the mean of its divisors is an integer number (12422242476).

Almost surely, 2^201122020020 is an apocalyptic number.

201122020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201122020020 is an abundant number, since it is smaller than the sum of its proper divisors (395145618828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201122020020 is a wasteful number, since it uses less digits than its factorization.

201122020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197178480 (or 197178478 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 201122020020 its reverse (20020221102), we get a palindrome (221142241122).

It can be divided in two parts, 201 and 122020020, that added together give a palindrome (122020221).

The spelling of 201122020020 in words is "two hundred one billion, one hundred twenty-two million, twenty thousand, twenty".