1212401312 has 12 divisors (see below), whose sum is σ = 2386915146. Its totient is φ = 606200640.

The previous prime is 1212401269. The next prime is 1212401321. The reversal of 1212401312 is 2131042121.

It can be written as a sum of positive squares in only one way, i.e., 1194117136 + 18284176 = 34556^2 + 4276^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18943739 + ... + 18943802.

Almost surely, 2^1212401312 is an apocalyptic number.

It is an amenable number.

1212401312 is a deficient number, since it is larger than the sum of its proper divisors (1174513834).

1212401312 is an equidigital number, since it uses as much as digits as its factorization.

1212401312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37887551 (or 37887543 counting only the distinct ones).

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

The square root of 1212401312 is about 34819.5535870292. The cubic root of 1212401312 is about 1066.3066865132.

Adding to 1212401312 its reverse (2131042121), we get a palindrome (3343443433).

The spelling of 1212401312 in words is "one billion, two hundred twelve million, four hundred one thousand, three hundred twelve".