1212330120 has 64 divisors (see below), whose sum is σ = 3655523520. Its totient is φ = 321640704.

The previous prime is 1212330103. The next prime is 1212330127. The reversal of 1212330120 is 210332121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1212330120.

It is not an unprimeable number, because it can be changed into a prime (1212330127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2002 + ... + 49281.

It is an arithmetic number, because the mean of its divisors is an integer number (57117555).

Almost surely, 2^1212330120 is an apocalyptic number.

1212330120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212330120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1827761760).

1212330120 is an abundant number, since it is smaller than the sum of its proper divisors (2443193400).

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

1212330120 is a wasteful number, since it uses less digits than its factorization.

1212330120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51494 (or 51490 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1212330120 is about 34818.5312728725. The cubic root of 1212330120 is about 1066.2858149885.

Adding to 1212330120 its reverse (210332121), we get a palindrome (1422662241).

The spelling of 1212330120 in words is "one billion, two hundred twelve million, three hundred thirty thousand, one hundred twenty".