122221222201100 has 144 divisors (see below), whose sum is σ = 291381071355360. Its totient is φ = 44129567539200.

The previous prime is 122221222201087. The next prime is 122221222201153. The reversal of 122221222201100 is 1102222122221.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 243083162 + ... + 243585438.

It is an arithmetic number, because the mean of its divisors is an integer number (2023479662190).

Almost surely, 2^{122221222201100} is an apocalyptic number.

122221222201100 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 122221222201100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145690535677680).

122221222201100 is an abundant number, since it is smaller than the sum of its proper divisors (169159849154260).

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

122221222201100 is a wasteful number, since it uses less digits than its factorization.

122221222201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503868 (or 503861 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 122221222201100 its reverse (1102222122221), we get a palindrome (123323444323321).

The spelling of 122221222201100 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred one thousand, one hundred".