121220020220 has 48 divisors (see below), whose sum is σ = 276858092448. Its totient is φ = 44315001600.

The previous prime is 121220020199. The next prime is 121220020261. The reversal of 121220020220 is 22020022121.

121220020220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 121220020195 and 121220020204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2281814 + ... + 2334333.

It is an arithmetic number, because the mean of its divisors is an integer number (5767876926).

Almost surely, 2^121220020220 is an apocalyptic number.

121220020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220020220 is an abundant number, since it is smaller than the sum of its proper divisors (155638072228).

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

121220020220 is a wasteful number, since it uses less digits than its factorization.

121220020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616270 (or 4616268 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 121220020220 its reverse (22020022121), we get a palindrome (143240042341).

The spelling of 121220020220 in words is "one hundred twenty-one billion, two hundred twenty million, twenty thousand, two hundred twenty".