121100022220 has 48 divisors (see below), whose sum is σ = 267761894400. Its totient is φ = 45879030720.

The previous prime is 121100022203. The next prime is 121100022283. The reversal of 121100022220 is 22220001121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121100022220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1562341 + ... + 1638019.

It is an arithmetic number, because the mean of its divisors is an integer number (5578372800).

Almost surely, 2^121100022220 is an apocalyptic number.

121100022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100022220 is an abundant number, since it is smaller than the sum of its proper divisors (146661872180).

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

121100022220 is a wasteful number, since it uses less digits than its factorization.

121100022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79918 (or 79916 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121100022220 its reverse (22220001121), we get a palindrome (143320023341).

The spelling of 121100022220 in words is "one hundred twenty-one billion, one hundred million, twenty-two thousand, two hundred twenty".