1243312120120 has 32 divisors (see below), whose sum is σ = 3197088309600. Its totient is φ = 426278441088.

The previous prime is 1243312120117. The next prime is 1243312120147. The reversal of 1243312120120 is 210212133421.

It is a junction number, because it is equal to n+sod(n) for n = 1243312120091 and 1243312120100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2220199935 + ... + 2220200494.

It is an arithmetic number, because the mean of its divisors is an integer number (99909009675).

Almost surely, 2^{1243312120120} is an apocalyptic number.

1243312120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243312120120 is an abundant number, since it is smaller than the sum of its proper divisors (1953776189480).

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

1243312120120 is a wasteful number, since it uses less digits than its factorization.

1243312120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4440400447 (or 4440400443 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1243312120120 its reverse (210212133421), we get a palindrome (1453524253541).

The spelling of 1243312120120 in words is "one trillion, two hundred forty-three billion, three hundred twelve million, one hundred twenty thousand, one hundred twenty".