1212211100212 has 48 divisors (see below), whose sum is σ = 2536335809280. Its totient is φ = 495653697792.

The previous prime is 1212211100197. The next prime is 1212211100227. The reversal of 1212211100212 is 2120011122121.

It is an interprime number because it is at equal distance from previous prime (1212211100197) and next prime (1212211100227).

It is a congruent number.

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, 2168913 + ... + 2669944.

It is an arithmetic number, because the mean of its divisors is an integer number (52840329360).

Almost surely, 2^{1212211100212} is an apocalyptic number.

It is an amenable number.

1212211100212 is an abundant number, since it is smaller than the sum of its proper divisors (1324124709068).

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

1212211100212 is a wasteful number, since it uses less digits than its factorization.

1212211100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4839280 (or 4839278 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212211100212 its reverse (2120011122121), we get a palindrome (3332222222333).

The spelling of 1212211100212 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred thousand, two hundred twelve".