12121123120 has 40 divisors (see below), whose sum is σ = 28460656080. Its totient is φ = 4800441600.

The previous prime is 12121123081. The next prime is 12121123193. The reversal of 12121123120 is 2132112121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 12121123094 and 12121123103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741990 + ... + 758149.

It is an arithmetic number, because the mean of its divisors is an integer number (711516402).

Almost surely, 2^12121123120 is an apocalyptic number.

12121123120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121123120 is an abundant number, since it is smaller than the sum of its proper divisors (16339532960).

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

12121123120 is a wasteful number, since it uses less digits than its factorization.

12121123120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500253 (or 1500247 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12121123120 its reverse (2132112121), we get a palindrome (14253235241).

The spelling of 12121123120 in words is "twelve billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred twenty".