121120211021220 has 36 divisors (see below), whose sum is σ = 367397973431580. Its totient is φ = 32298722938944.

The previous prime is 121120211021219. The next prime is 121120211021233. The reversal of 121120211021220 is 22120112021121.

121120211021220 is a `hidden beast` number, since 1 + 211 + 2 + 0 + 211 + 0 + 21 + 220 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 58516257766464 + 62603953254756 = 7649592^2 + 7912266^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 121120211021193 and 121120211021202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336445030435 + ... + 336445030794.

Almost surely, 2^{121120211021220} is an apocalyptic number.

121120211021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121120211021220 is an abundant number, since it is smaller than the sum of its proper divisors (246277762410360).

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

121120211021220 is a wasteful number, since it uses less digits than its factorization.

121120211021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672890061244 (or 672890061239 counting only the distinct ones).

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

Adding to 121120211021220 its reverse (22120112021121), we get a palindrome (143240323042341).

Subtracting from 121120211021220 its reverse (22120112021121), we obtain a palindrome (99000099000099).

The spelling of 121120211021220 in words is "one hundred twenty-one trillion, one hundred twenty billion, two hundred eleven million, twenty-one thousand, two hundred twenty".