20103121220020 has 96 divisors (see below), whose sum is σ = 44571882700800. Its totient is φ = 7595181270144.

The previous prime is 20103121220003. The next prime is 20103121220047. The reversal of 20103121220020 is 2002212130102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20103121219976 and 20103121220003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 230077101 + ... + 230164459.

It is an arithmetic number, because the mean of its divisors is an integer number (464290444800).

Almost surely, 2^{20103121220020} is an apocalyptic number.

20103121220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20103121220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22285941350400).

20103121220020 is an abundant number, since it is smaller than the sum of its proper divisors (24468761480780).

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

20103121220020 is a wasteful number, since it uses less digits than its factorization.

20103121220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89197 (or 89195 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20103121220020 its reverse (2002212130102), we get a palindrome (22105333350122).

The spelling of 20103121220020 in words is "twenty trillion, one hundred three billion, one hundred twenty-one million, two hundred twenty thousand, twenty".