1223321100100 has 144 divisors (see below), whose sum is σ = 2957491958400. Its totient is φ = 435487360000.

The previous prime is 1223321100037. The next prime is 1223321100103. The reversal of 1223321100100 is 10011233221.

It is not an unprimeable number, because it can be changed into a prime (1223321100103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9826041 + ... + 9949759.

It is an arithmetic number, because the mean of its divisors is an integer number (20538138600).

Almost surely, 2^{1223321100100} is an apocalyptic number.

1223321100100 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 1223321100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1478745979200).

1223321100100 is an abundant number, since it is smaller than the sum of its proper divisors (1734170858300).

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

1223321100100 is a wasteful number, since it uses less digits than its factorization.

1223321100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123934 (or 123927 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1223321100100 its reverse (10011233221), we get a palindrome (1233332333321).

The spelling of 1223321100100 in words is "one trillion, two hundred twenty-three billion, three hundred twenty-one million, one hundred thousand, one hundred".