20001122120020 has 48 divisors (see below), whose sum is σ = 42509270240640. Its totient is φ = 7903897748096.

The previous prime is 20001122120017. The next prime is 20001122120093. The reversal of 20001122120020 is 2002122110002.

It is a happy number.

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, 113902809 + ... + 114078271.

It is an arithmetic number, because the mean of its divisors is an integer number (885609796680).

Almost surely, 2^{20001122120020} is an apocalyptic number.

20001122120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001122120020 is an abundant number, since it is smaller than the sum of its proper divisors (22508148120620).

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

20001122120020 is a wasteful number, since it uses less digits than its factorization.

20001122120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244224 (or 244222 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20001122120020 its reverse (2002122110002), we get a palindrome (22003244230022).

The spelling of 20001122120020 in words is "twenty trillion, one billion, one hundred twenty-two million, one hundred twenty thousand, twenty".