20022012121220 has 72 divisors (see below), whose sum is σ = 43972091231040. Its totient is φ = 7657408834240.

The previous prime is 20022012121211. The next prime is 20022012121229. The reversal of 20022012121220 is 2212121022002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20022012121211) and next prime (20022012121229).

It is not an unprimeable number, because it can be changed into a prime (20022012121229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25115921 + ... + 25900839.

It is an arithmetic number, because the mean of its divisors is an integer number (610723489320).

Almost surely, 2^{20022012121220} is an apocalyptic number.

20022012121220 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 20022012121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21986045615520).

20022012121220 is an abundant number, since it is smaller than the sum of its proper divisors (23950079109820).

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

20022012121220 is a wasteful number, since it uses less digits than its factorization.

20022012121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787385 (or 787360 counting only the distinct ones).

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

Adding to 20022012121220 its reverse (2212121022002), we get a palindrome (22234133143222).

The spelling of 20022012121220 in words is "twenty trillion, twenty-two billion, twelve million, one hundred twenty-one thousand, two hundred twenty".