1212220312 has 32 divisors (see below), whose sum is σ = 2308783680. Its totient is φ = 596599200.

The previous prime is 1212220301. The next prime is 1212220333. The reversal of 1212220312 is 2130222121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184687 + ... + 191137.

It is an arithmetic number, because the mean of its divisors is an integer number (72149490).

Almost surely, 2^1212220312 is an apocalyptic number.

It is an amenable number.

1212220312 is a deficient number, since it is larger than the sum of its proper divisors (1096563368).

1212220312 is a wasteful number, since it uses less digits than its factorization.

1212220312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6823 (or 6819 counting only the distinct ones).

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

The square root of 1212220312 is about 34816.9543757061. The cubic root of 1212220312 is about 1066.2536207190.

Adding to 1212220312 its reverse (2130222121), we get a palindrome (3342442433).

The spelling of 1212220312 in words is "one billion, two hundred twelve million, two hundred twenty thousand, three hundred twelve".