1212211012208 has 40 divisors (see below), whose sum is σ = 2741291784192. Its totient is φ = 508465407168.

The previous prime is 1212211012183. The next prime is 1212211012219. The reversal of 1212211012208 is 8022101122121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115136360 + ... + 115146887.

Almost surely, 2^{1212211012208} is an apocalyptic number.

It is an amenable number.

1212211012208 is an abundant number, since it is smaller than the sum of its proper divisors (1529080771984).

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

1212211012208 is a wasteful number, since it uses less digits than its factorization.

1212211012208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230283309 (or 230283303 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

Adding to 1212211012208 its reverse (8022101122121), we get a palindrome (9234312134329).

The spelling of 1212211012208 in words is "one trillion, two hundred twelve billion, two hundred eleven million, twelve thousand, two hundred eight".