121200011100220 has 192 divisors, whose sum is σ = 290670369091200. Its totient is φ = 42053345574912.

The previous prime is 121200011100211. The next prime is 121200011100241. The reversal of 121200011100220 is 22001110002121.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 121200011100220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8962502379 + ... + 8962515901.

It is an arithmetic number, because the mean of its divisors is an integer number (1513908172350).

Almost surely, 2^{121200011100220} is an apocalyptic number.

121200011100220 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 121200011100220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145335184545600).

121200011100220 is an abundant number, since it is smaller than the sum of its proper divisors (169470357990980).

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

121200011100220 is a wasteful number, since it uses less digits than its factorization.

121200011100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16544 (or 16542 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121200011100220 its reverse (22001110002121), we get a palindrome (143201121102341).

The spelling of 121200011100220 in words is "one hundred twenty-one trillion, two hundred billion, eleven million, one hundred thousand, two hundred twenty".