1212320120 has 64 divisors (see below), whose sum is σ = 2979491040. Its totient is φ = 440281600.

The previous prime is 1212320119. The next prime is 1212320129. The reversal of 1212320120 is 210232121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1212320095 and 1212320104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212320129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 518474 + ... + 520806.

Almost surely, 2^1212320120 is an apocalyptic number.

1212320120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212320120 is an abundant number, since it is smaller than the sum of its proper divisors (1767170920).

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

1212320120 is a wasteful number, since it uses less digits than its factorization.

1212320120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3536 (or 3532 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1212320120 is about 34818.3876708845. The cubic root of 1212320120 is about 1066.2828831998.

Adding to 1212320120 its reverse (210232121), we get a palindrome (1422552241).

The spelling of 1212320120 in words is "one billion, two hundred twelve million, three hundred twenty thousand, one hundred twenty".