121221222201220 has 48 divisors (see below), whose sum is σ = 267989944723200. Its totient is φ = 45931792919040.

The previous prime is 121221222201203. The next prime is 121221222201227. The reversal of 121221222201220 is 22102222122121.

It is a junction number, because it is equal to n+sod(n) for n = 121221222201191 and 121221222201200.

It is not an unprimeable number, because it can be changed into a prime (121221222201227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12472341 + ... + 19949980.

It is an arithmetic number, because the mean of its divisors is an integer number (5583123848400).

Almost surely, 2^{121221222201220} is an apocalyptic number.

121221222201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121221222201220 is an abundant number, since it is smaller than the sum of its proper divisors (146768722521980).

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

121221222201220 is a wasteful number, since it uses less digits than its factorization.

121221222201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32432188 (or 32432186 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 121221222201220 its reverse (22102222122121), we get a palindrome (143323444323341).

The spelling of 121221222201220 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty".