1212147012 has 48 divisors (see below), whose sum is σ = 2962713600. Its totient is φ = 384989088.

The previous prime is 1212146977. The next prime is 1212147029. The reversal of 1212147012 is 2107412121.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 1212147012.

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, 64239 + ... + 80937.

It is an arithmetic number, because the mean of its divisors is an integer number (61723200).

Almost surely, 2^1212147012 is an apocalyptic number.

1212147012 is a gapful number since it is divisible by the number (12) 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 1212147012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1481356800).

1212147012 is an abundant number, since it is smaller than the sum of its proper divisors (1750566588).

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

1212147012 is a wasteful number, since it uses less digits than its factorization.

1212147012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16992 (or 16990 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1212147012 is about 34815.9017117179. The cubic root of 1212147012 is about 1066.2321290355.

Adding to 1212147012 its reverse (2107412121), we get a palindrome (3319559133).

The spelling of 1212147012 in words is "one billion, two hundred twelve million, one hundred forty-seven thousand, twelve".