121121020102200 has 192 divisors, whose sum is σ = 381853180368000. Its totient is φ = 31750332234240.

The previous prime is 121121020102189. The next prime is 121121020102223. The reversal of 121121020102200 is 2201020121121.

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 121121020102200.

It is a congruent number.

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, 1409832846 + ... + 1409918754.

It is an arithmetic number, because the mean of its divisors is an integer number (1988818647750).

Almost surely, 2^{121121020102200} is an apocalyptic number.

121121020102200 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 121121020102200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190926590184000).

121121020102200 is an abundant number, since it is smaller than the sum of its proper divisors (260732160265800).

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

121121020102200 is a wasteful number, since it uses less digits than its factorization.

121121020102200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125814 (or 125805 counting only the distinct ones).

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

Adding to 121121020102200 its reverse (2201020121121), we get a palindrome (123322040223321).

The spelling of 121121020102200 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty million, one hundred two thousand, two hundred".