1221232012 has 192 divisors, whose sum is σ = 3048192000. Its totient is φ = 412600320.

The previous prime is 1221231997. The next prime is 1221232031. The reversal of 1221232012 is 2102321221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8196114 + ... + 8196262.

It is an arithmetic number, because the mean of its divisors is an integer number (15876000).

Almost surely, 2^1221232012 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 1221232012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1524096000).

1221232012 is an abundant number, since it is smaller than the sum of its proper divisors (1826959988).

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

1221232012 is a wasteful number, since it uses less digits than its factorization.

1221232012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 294 counting only the distinct ones).

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

The square root of 1221232012 is about 34946.1301434079. The cubic root of 1221232012 is about 1068.8892925981.

Adding to 1221232012 its reverse (2102321221), we get a palindrome (3323553233).

The spelling of 1221232012 in words is "one billion, two hundred twenty-one million, two hundred thirty-two thousand, twelve".