122221120220020 has 144 divisors (see below), whose sum is σ = 266520043585152. Its totient is φ = 47046137057280.

The previous prime is 122221120220009. The next prime is 122221120220033. The reversal of 122221120220020 is 20022021122221.

It is a self number, because there is not a number n which added to its sum of digits gives 122221120220020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12748625667 + ... + 12748635253.

It is an arithmetic number, because the mean of its divisors is an integer number (1850833636008).

Almost surely, 2^{122221120220020} is an apocalyptic number.

122221120220020 is a gapful number since it is divisible by the number (10) 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 122221120220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133260021792576).

122221120220020 is an abundant number, since it is smaller than the sum of its proper divisors (144298923365132).

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

122221120220020 is a wasteful number, since it uses less digits than its factorization.

122221120220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11658 (or 11559 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 122221120220020 its reverse (20022021122221), we get a palindrome (142243141342241).

The spelling of 122221120220020 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty million, two hundred twenty thousand, twenty".