12121122111120 has 160 divisors (see below), whose sum is σ = 45546034688640. Its totient is φ = 2938453839360.

The previous prime is 12121122111113. The next prime is 12121122111167. The reversal of 12121122111120 is 2111122112121.

It is a happy number.

12121122111120 is a `hidden beast` number, since 121 + 211 + 2 + 211 + 1 + 120 = 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 = 12121122111093 and 12121122111102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255050359 + ... + 255097878.

It is an arithmetic number, because the mean of its divisors is an integer number (284662716804).

Almost surely, 2^{12121122111120} is an apocalyptic number.

12121122111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121122111120 is an abundant number, since it is smaller than the sum of its proper divisors (33424912577520).

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

12121122111120 is a wasteful number, since it uses less digits than its factorization.

12121122111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510148270 (or 510148258 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12121122111120 its reverse (2111122112121), we get a palindrome (14232244223241).

The spelling of 12121122111120 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, one hundred twenty".