121330121220 has 144 divisors (see below), whose sum is σ = 458848510848. Its totient is φ = 25211450880.

The previous prime is 121330121219. The next prime is 121330121239. The reversal of 121330121220 is 22121033121.

121330121220 is a `hidden beast` number, since 121 + 3 + 301 + 21 + 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 = 121330121193 and 121330121202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4363129 + ... + 4390848.

It is an arithmetic number, because the mean of its divisors is an integer number (3186447992).

Almost surely, 2^121330121220 is an apocalyptic number.

121330121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121330121220 is an abundant number, since it is smaller than the sum of its proper divisors (337518389628).

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

121330121220 is a wasteful number, since it uses less digits than its factorization.

121330121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8754010 (or 8754005 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121330121220 its reverse (22121033121), we get a palindrome (143451154341).

The spelling of 121330121220 in words is "one hundred twenty-one billion, three hundred thirty million, one hundred twenty-one thousand, two hundred twenty".