121121010220 has 48 divisors (see below), whose sum is σ = 290711328768. Its totient is φ = 41524217280.

The previous prime is 121121010173. The next prime is 121121010259. The reversal of 121121010220 is 22010121121.

It is a self number, because there is not a number n which added to its sum of digits gives 121121010220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2917005 + ... + 2958235.

It is an arithmetic number, because the mean of its divisors is an integer number (6056486016).

Almost surely, 2^121121010220 is an apocalyptic number.

121121010220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121010220 is an abundant number, since it is smaller than the sum of its proper divisors (169590318548).

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

121121010220 is a wasteful number, since it uses less digits than its factorization.

121121010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62230 (or 62228 counting only the distinct ones).

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

Adding to 121121010220 its reverse (22010121121), we get a palindrome (143131131341).

The spelling of 121121010220 in words is "one hundred twenty-one billion, one hundred twenty-one million, ten thousand, two hundred twenty".