121101222220 has 24 divisors (see below), whose sum is σ = 277431891408. Its totient is φ = 44036808000.

The previous prime is 121101222181. The next prime is 121101222233. The reversal of 121101222220 is 22222101121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121101222194 and 121101222203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275229831 + ... + 275230270.

It is an arithmetic number, because the mean of its divisors is an integer number (11559662142).

Almost surely, 2^121101222220 is an apocalyptic number.

121101222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101222220 is an abundant number, since it is smaller than the sum of its proper divisors (156330669188).

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

121101222220 is a wasteful number, since it uses less digits than its factorization.

121101222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550460121 (or 550460119 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121101222220 its reverse (22222101121), we get a palindrome (143323323341).

The spelling of 121101222220 in words is "one hundred twenty-one billion, one hundred one million, two hundred twenty-two thousand, two hundred twenty".