121112021120220 has 192 divisors, whose sum is σ = 407098784547840. Its totient is φ = 29715081175296.

The previous prime is 121112021120203. The next prime is 121112021120231. The reversal of 121112021120220 is 22021120211121.

121112021120220 is a `hidden beast` number, since 1 + 211 + 1 + 2 + 0 + 211 + 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 = 121112021120193 and 121112021120202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25943272 + ... + 30253551.

It is an arithmetic number, because the mean of its divisors is an integer number (2120306169520).

Almost surely, 2^{121112021120220} is an apocalyptic number.

121112021120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112021120220 is an abundant number, since it is smaller than the sum of its proper divisors (285986763427620).

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

121112021120220 is a wasteful number, since it uses less digits than its factorization.

121112021120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56197161 (or 56197153 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121112021120220 its reverse (22021120211121), we get a palindrome (143133141331341).

Subtracting from 121112021120220 its reverse (22021120211121), we obtain a palindrome (99090900909099).

The spelling of 121112021120220 in words is "one hundred twenty-one trillion, one hundred twelve billion, twenty-one million, one hundred twenty thousand, two hundred twenty".