121220212010220 has 96 divisors (see below), whose sum is σ = 383521574822400. Its totient is φ = 31777501897152.

The previous prime is 121220212010201. The next prime is 121220212010237. The reversal of 121220212010220 is 22010212022121.

It is a happy number.

121220212010220 is a `hidden beast` number, since 1 + 2 + 1 + 220 + 21 + 201 + 0 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121220212010193 and 121220212010202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1902356904 + ... + 1902420623.

It is an arithmetic number, because the mean of its divisors is an integer number (3995016404400).

Almost surely, 2^{121220212010220} is an apocalyptic number.

121220212010220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220212010220 is an abundant number, since it is smaller than the sum of its proper divisors (262301362812180).

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

121220212010220 is a wasteful number, since it uses less digits than its factorization.

121220212010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804777604 (or 3804777596 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121220212010220 its reverse (22010212022121), we get a palindrome (143230424032341).

The spelling of 121220212010220 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred twelve million, ten thousand, two hundred twenty".