20122221110020 has 12 divisors (see below), whose sum is σ = 42256664331084. Its totient is φ = 8048888444000.

The previous prime is 20122221110003. The next prime is 20122221110023. The reversal of 20122221110020 is 2001112222102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10309840279236 + 9812380830784 = 3210894^2 + 3132472^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20122221109976 and 20122221110003.

It is not an unprimeable number, because it can be changed into a prime (20122221110023) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 503055527731 + ... + 503055527770.

It is an arithmetic number, because the mean of its divisors is an integer number (3521388694257).

Almost surely, 2^{20122221110020} is an apocalyptic number.

20122221110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122221110020 is an abundant number, since it is smaller than the sum of its proper divisors (22134443221064).

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

20122221110020 is a wasteful number, since it uses less digits than its factorization.

20122221110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006111055510 (or 1006111055508 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20122221110020 its reverse (2001112222102), we get a palindrome (22123333332122).

The spelling of 20122221110020 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred ten thousand, twenty".