12121200120 has 64 divisors (see below), whose sum is σ = 36480637440. Its totient is φ = 3221916800.

The previous prime is 12121200103. The next prime is 12121200121. The reversal of 12121200120 is 2100212121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12121200096 and 12121200105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121200121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125076 + ... + 199715.

It is an arithmetic number, because the mean of its divisors is an integer number (570009960).

Almost surely, 2^12121200120 is an apocalyptic number.

12121200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121200120 is an abundant number, since it is smaller than the sum of its proper divisors (24359437320).

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

12121200120 is a wasteful number, since it uses less digits than its factorization.

12121200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325116 (or 325112 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12121200120 its reverse (2100212121), we get a palindrome (14221412241).

The spelling of 12121200120 in words is "twelve billion, one hundred twenty-one million, two hundred thousand, one hundred twenty".