20022121222220 has 48 divisors (see below), whose sum is σ = 46842204044160. Its totient is φ = 7137859658496.

The previous prime is 20022121222189. The next prime is 20022121222273. The reversal of 20022121222220 is 2222212122002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20022121222192 and 20022121222201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1327719332 + ... + 1327734411.

It is an arithmetic number, because the mean of its divisors is an integer number (975879250920).

Almost surely, 2^{20022121222220} is an apocalyptic number.

20022121222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022121222220 is an abundant number, since it is smaller than the sum of its proper divisors (26820082821940).

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

20022121222220 is a wasteful number, since it uses less digits than its factorization.

20022121222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655453794 (or 2655453792 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20022121222220 its reverse (2222212122002), we get a palindrome (22244333344222).

The spelling of 20022121222220 in words is "twenty trillion, twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty".