1121220122100 has 288 divisors, whose sum is σ = 3537398592000. Its totient is φ = 272541265920.

The previous prime is 1121220122069. The next prime is 1121220122101. The reversal of 1121220122100 is 12210221211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1121220122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121220122101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 360635346 + ... + 360638454.

It is an arithmetic number, because the mean of its divisors is an integer number (12282634000).

Almost surely, 2^{1121220122100} is an apocalyptic number.

1121220122100 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 1121220122100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1768699296000).

1121220122100 is an abundant number, since it is smaller than the sum of its proper divisors (2416178469900).

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

1121220122100 is a wasteful number, since it uses less digits than its factorization.

1121220122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4267 (or 4260 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1121220122100 its reverse (12210221211), we get a palindrome (1133430343311).

The spelling of 1121220122100 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred".