121220022220 has 24 divisors (see below), whose sum is σ = 277704051408. Its totient is φ = 44080008000.

The previous prime is 121220022199. The next prime is 121220022239. The reversal of 121220022220 is 22220022121.

It is a junction number, because it is equal to n+sod(n) for n = 121220022194 and 121220022203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275499831 + ... + 275500270.

It is an arithmetic number, because the mean of its divisors is an integer number (11571002142).

Almost surely, 2^121220022220 is an apocalyptic number.

121220022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220022220 is an abundant number, since it is smaller than the sum of its proper divisors (156484029188).

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

121220022220 is a wasteful number, since it uses less digits than its factorization.

121220022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551000121 (or 551000119 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 121220022220 its reverse (22220022121), we get a palindrome (143440044341).

Subtracting from 121220022220 its reverse (22220022121), we obtain a palindrome (99000000099).

The spelling of 121220022220 in words is "one hundred twenty-one billion, two hundred twenty million, twenty-two thousand, two hundred twenty".