20022121221020 has 24 divisors (see below), whose sum is σ = 42047387495568. Its totient is φ = 8008670787200.

The previous prime is 20022121221019. The next prime is 20022121221043. The reversal of 20022121221020 is 2012212122002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20022121221020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10180526 + ... + 11986965.

It is an arithmetic number, because the mean of its divisors is an integer number (1751974478982).

Almost surely, 2^{20022121221020} is an apocalyptic number.

20022121221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022121221020 is an abundant number, since it is smaller than the sum of its proper divisors (22025266274548).

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

20022121221020 is a wasteful number, since it uses less digits than its factorization.

20022121221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22212661 (or 22212659 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20022121221020 its reverse (2012212122002), we get a palindrome (22034333343022).

The spelling of 20022121221020 in words is "twenty trillion, twenty-two billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty".