12121310120 has 64 divisors (see below), whose sum is σ = 27807872400. Its totient is φ = 4754350080.

The previous prime is 12121310111. The next prime is 12121310143. The reversal of 12121310120 is 2101312121.

It can be written as a sum of positive squares in 8 ways, for example, as 9856121284 + 2265188836 = 99278^2 + 47594^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12121310095 and 12121310104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408590 + ... + 437250.

Almost surely, 2^12121310120 is an apocalyptic number.

12121310120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121310120 is an abundant number, since it is smaller than the sum of its proper divisors (15686562280).

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

12121310120 is a wasteful number, since it uses less digits than its factorization.

12121310120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28878 (or 28874 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12121310120 its reverse (2101312121), we get a palindrome (14222622241).

The spelling of 12121310120 in words is "twelve billion, one hundred twenty-one million, three hundred ten thousand, one hundred twenty".