122221100000 has 144 divisors (see below), whose sum is σ = 301335307056. Its totient is φ = 48794880000.

The previous prime is 122221099969. The next prime is 122221100017. The reversal of 122221100000 is 1122221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78699224 + ... + 78700776.

It is an arithmetic number, because the mean of its divisors is an integer number (2092606299).

Almost surely, 2^122221100000 is an apocalyptic number.

122221100000 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 122221100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150667653528).

122221100000 is an abundant number, since it is smaller than the sum of its proper divisors (179114207056).

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

122221100000 is an frugal number, since it uses more digits than its factorization.

122221100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375 (or 2347 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 122221100000 its reverse (1122221), we get a palindrome (122222222221).

The spelling of 122221100000 in words is "one hundred twenty-two billion, two hundred twenty-one million, one hundred thousand".