121112220020220 has 144 divisors (see below), whose sum is σ = 431599911436512. Its totient is φ = 27102035243520.

The previous prime is 121112220020191. The next prime is 121112220020251. The reversal of 121112220020220 is 22020022211121.

It is a happy number.

121112220020220 is a `hidden beast` number, since 1 + 211 + 12 + 2 + 200 + 20 + 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 = 121112220020193 and 121112220020202.

It is a congruent number.

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, 2352581487 + ... + 2352632966.

It is an arithmetic number, because the mean of its divisors is an integer number (2997221607198).

Almost surely, 2^{121112220020220} is an apocalyptic number.

121112220020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112220020220 is an abundant number, since it is smaller than the sum of its proper divisors (310487691416292).

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

121112220020220 is a wasteful number, since it uses less digits than its factorization.

121112220020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4705214492 (or 4705214487 counting only the distinct ones).

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

Adding to 121112220020220 its reverse (22020022211121), we get a palindrome (143132242231341).

The spelling of 121112220020220 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred twenty million, twenty thousand, two hundred twenty".