121113342220 has 96 divisors (see below), whose sum is σ = 277410450240. Its totient is φ = 44149017600.

The previous prime is 121113342209. The next prime is 121113342241. The reversal of 121113342220 is 22243311121.

It is a junction number, because it is equal to n+sod(n) for n = 121113342191 and 121113342200.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8012670 + ... + 8027770.

It is an arithmetic number, because the mean of its divisors is an integer number (2889692190).

Almost surely, 2^121113342220 is an apocalyptic number.

121113342220 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 121113342220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138705225120).

121113342220 is an abundant number, since it is smaller than the sum of its proper divisors (156297108020).

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

121113342220 is a wasteful number, since it uses less digits than its factorization.

121113342220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15515 (or 15513 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 121113342220 its reverse (22243311121), we get a palindrome (143356653341).

The spelling of 121113342220 in words is "one hundred twenty-one billion, one hundred thirteen million, three hundred forty-two thousand, two hundred twenty".