121201222120220 has 96 divisors (see below), whose sum is σ = 280533130315200. Its totient is φ = 43617306378240.

The previous prime is 121201222120163. The next prime is 121201222120229. The reversal of 121201222120220 is 22021222102121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121201222120192 and 121201222120201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201222120229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 756401552 + ... + 756561768.

It is an arithmetic number, because the mean of its divisors is an integer number (2922220107450).

Almost surely, 2^{121201222120220} is an apocalyptic number.

121201222120220 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 121201222120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140266565157600).

121201222120220 is an abundant number, since it is smaller than the sum of its proper divisors (159331908194980).

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

121201222120220 is a wasteful number, since it uses less digits than its factorization.

121201222120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195783 (or 195781 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121201222120220 its reverse (22021222102121), we get a palindrome (143222444222341).

The spelling of 121201222120220 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twenty".