1212323120 has 40 divisors (see below), whose sum is σ = 2967005040. Its totient is φ = 459406080.

The previous prime is 1212323053. The next prime is 1212323129. The reversal of 1212323120 is 213232121.

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

It is not an unprimeable number, because it can be changed into a prime (1212323129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397271 + ... + 400310.

It is an arithmetic number, because the mean of its divisors is an integer number (74175126).

Almost surely, 2^1212323120 is an apocalyptic number.

1212323120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212323120 is an abundant number, since it is smaller than the sum of its proper divisors (1754681920).

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

1212323120 is a wasteful number, since it uses less digits than its factorization.

1212323120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797613 (or 797607 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1212323120 is about 34818.4307515431. The cubic root of 1212323120 is about 1066.2837627381.

Adding to 1212323120 its reverse (213232121), we get a palindrome (1425555241).

Subtracting from 1212323120 its reverse (213232121), we obtain a palindrome (999090999).

The spelling of 1212323120 in words is "one billion, two hundred twelve million, three hundred twenty-three thousand, one hundred twenty".