1211210312 has 32 divisors (see below), whose sum is σ = 2456441400. Its totient is φ = 556568064.

The previous prime is 1211210267. The next prime is 1211210323. The reversal of 1211210312 is 2130121121.

It can be written as a sum of positive squares in 4 ways, for example, as 813048196 + 398162116 = 28514^2 + 19954^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 1613 + ... + 49244.

Almost surely, 2^1211210312 is an apocalyptic number.

It is an amenable number.

1211210312 is an abundant number, since it is smaller than the sum of its proper divisors (1245231088).

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

1211210312 is a wasteful number, since it uses less digits than its factorization.

1211210312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51105 (or 51101 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1211210312 is about 34802.4469254678. The cubic root of 1211210312 is about 1065.9574107056.

Adding to 1211210312 its reverse (2130121121), we get a palindrome (3341331433).

The spelling of 1211210312 in words is "one billion, two hundred eleven million, two hundred ten thousand, three hundred twelve".