122221100100 has 144 divisors (see below), whose sum is σ = 388142657280. Its totient is φ = 29447452800.

The previous prime is 122221100093. The next prime is 122221100137. The reversal of 122221100100 is 1001122221.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 424291 + ... + 651509.

It is an arithmetic number, because the mean of its divisors is an integer number (2695435120).

Almost surely, 2^122221100100 is an apocalyptic number.

122221100100 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 122221100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194071328640).

122221100100 is an abundant number, since it is smaller than the sum of its proper divisors (265921557180).

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

122221100100 is a wasteful number, since it uses less digits than its factorization.

122221100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227410 (or 227403 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 122221100100 its reverse (1001122221), we get a palindrome (123222222321).

The spelling of 122221100100 in words is "one hundred twenty-two billion, two hundred twenty-one million, one hundred thousand, one hundred".