121220011110220 has 24 divisors (see below), whose sum is σ = 277704025453008. Its totient is φ = 44080004040000.

The previous prime is 121220011110199. The next prime is 121220011110221. The reversal of 121220011110220 is 22011110022121.

It is a junction number, because it is equal to n+sod(n) for n = 121220011110194 and 121220011110203.

It is not an unprimeable number, because it can be changed into a prime (121220011110221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275500025031 + ... + 275500025470.

It is an arithmetic number, because the mean of its divisors is an integer number (11571001060542).

Almost surely, 2^{121220011110220} is an apocalyptic number.

121220011110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220011110220 is an abundant number, since it is smaller than the sum of its proper divisors (156484014342788).

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

121220011110220 is a wasteful number, since it uses less digits than its factorization.

121220011110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551000050521 (or 551000050519 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121220011110220 its reverse (22011110022121), we get a palindrome (143231121132341).

The spelling of 121220011110220 in words is "one hundred twenty-one trillion, two hundred twenty billion, eleven million, one hundred ten thousand, two hundred twenty".