20020121022220 has 24 divisors (see below), whose sum is σ = 45864277251408. Its totient is φ = 7280044008000.

The previous prime is 20020121022193. The next prime is 20020121022221. The reversal of 20020121022220 is 2222012102002.

It is a junction number, because it is equal to n+sod(n) for n = 20020121022194 and 20020121022203.

It is not an unprimeable number, because it can be changed into a prime (20020121022221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45500274831 + ... + 45500275270.

It is an arithmetic number, because the mean of its divisors is an integer number (1911011552142).

Almost surely, 2^{20020121022220} is an apocalyptic number.

20020121022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020121022220 is an abundant number, since it is smaller than the sum of its proper divisors (25844156229188).

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

20020121022220 is a wasteful number, since it uses less digits than its factorization.

20020121022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91000550121 (or 91000550119 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20020121022220 its reverse (2222012102002), we get a palindrome (22242133124222).

The spelling of 20020121022220 in words is "twenty trillion, twenty billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty".