1212122312 has 8 divisors (see below), whose sum is σ = 2272729350. Its totient is φ = 606061152.

The previous prime is 1212122297. The next prime is 1212122323. The reversal of 1212122312 is 2132212121.

It can be written as a sum of positive squares in only one way, i.e., 1195361476 + 16760836 = 34574^2 + 4094^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 75757637 + ... + 75757652.

Almost surely, 2^1212122312 is an apocalyptic number.

It is an amenable number.

1212122312 is a deficient number, since it is larger than the sum of its proper divisors (1060607038).

1212122312 is a wasteful number, since it uses less digits than its factorization.

1212122312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151515295 (or 151515291 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 1212122312 is about 34815.5469869425. The cubic root of 1212122312 is about 1066.2248867587.

Adding to 1212122312 its reverse (2132212121), we get a palindrome (3344334433).

The spelling of 1212122312 in words is "one billion, two hundred twelve million, one hundred twenty-two thousand, three hundred twelve".