1212206340 has 48 divisors (see below), whose sum is σ = 3395726208. Its totient is φ = 323107584.

The previous prime is 1212206291. The next prime is 1212206357. The reversal of 1212206340 is 436022121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212769 + ... + 218391.

It is an arithmetic number, because the mean of its divisors is an integer number (70744296).

Almost surely, 2^1212206340 is an apocalyptic number.

1212206340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212206340 is an abundant number, since it is smaller than the sum of its proper divisors (2183519868).

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

1212206340 is a wasteful number, since it uses less digits than its factorization.

1212206340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9228 (or 9226 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1212206340 is about 34816.7537257568. The cubic root of 1212206340 is about 1066.2495241719.

Adding to 1212206340 its reverse (436022121), we get a palindrome (1648228461).

The spelling of 1212206340 in words is "one billion, two hundred twelve million, two hundred six thousand, three hundred forty".