122120455220 has 96 divisors (see below), whose sum is σ = 280823760000. Its totient is φ = 44431123968.

The previous prime is 122120455217. The next prime is 122120455229. The reversal of 122120455220 is 22554021221.

It is a self number, because there is not a number n which added to its sum of digits gives 122120455220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122120455229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1941626 + ... + 2003534.

It is an arithmetic number, because the mean of its divisors is an integer number (2925247500).

Almost surely, 2^122120455220 is an apocalyptic number.

122120455220 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 122120455220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140411880000).

122120455220 is an abundant number, since it is smaller than the sum of its proper divisors (158703304780).

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

122120455220 is a wasteful number, since it uses less digits than its factorization.

122120455220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62145 (or 62143 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 122120455220 its reverse (22554021221), we get a palindrome (144674476441).

The spelling of 122120455220 in words is "one hundred twenty-two billion, one hundred twenty million, four hundred fifty-five thousand, two hundred twenty".