1213322012 has 24 divisors (see below), whose sum is σ = 2431031904. Its totient is φ = 519054912.

The previous prime is 1213322009. The next prime is 1213322021. The reversal of 1213322012 is 2102233121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23303 + ... + 54494.

It is an arithmetic number, because the mean of its divisors is an integer number (101292996).

Almost surely, 2^1213322012 is an apocalyptic number.

It is an amenable number.

1213322012 is an abundant number, since it is smaller than the sum of its proper divisors (1217709892).

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

1213322012 is a wasteful number, since it uses less digits than its factorization.

1213322012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78365 (or 78363 counting only the distinct ones).

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

The square root of 1213322012 is about 34832.7720975520. The cubic root of 1213322012 is about 1066.5765366988.

Adding to 1213322012 its reverse (2102233121), we get a palindrome (3315555133).

The spelling of 1213322012 in words is "one billion, two hundred thirteen million, three hundred twenty-two thousand, twelve".