1212223012 has 144 divisors (see below), whose sum is σ = 3040571520. Its totient is φ = 410065920.

The previous prime is 1212223007. The next prime is 1212223043. The reversal of 1212223012 is 2103222121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 747939 + ... + 749557.

It is an arithmetic number, because the mean of its divisors is an integer number (21115080).

Almost surely, 2^1212223012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212223012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1520285760).

1212223012 is an abundant number, since it is smaller than the sum of its proper divisors (1828348508).

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

1212223012 is a wasteful number, since it uses less digits than its factorization.

1212223012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682 (or 1669 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1212223012 is about 34816.9931498974. The cubic root of 1212223012 is about 1066.2544123470.

Adding to 1212223012 its reverse (2103222121), we get a palindrome (3315445133).

The spelling of 1212223012 in words is "one billion, two hundred twelve million, two hundred twenty-three thousand, twelve".