1211100101212 has 12 divisors (see below), whose sum is σ = 2146253344480. Its totient is φ = 597884859936.

The previous prime is 1211100101203. The next prime is 1211100101221. The reversal of 1211100101212 is 2121010011121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1211100101203) and next prime (1211100101221).

It is a junction number, because it is equal to n+sod(n) for n = 1211100101192 and 1211100101201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1916297313 + ... + 1916297944.

Almost surely, 2^{1211100101212} is an apocalyptic number.

It is an amenable number.

1211100101212 is a deficient number, since it is larger than the sum of its proper divisors (935153243268).

1211100101212 is a wasteful number, since it uses less digits than its factorization.

1211100101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3832595340 (or 3832595338 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211100101212 its reverse (2121010011121), we get a palindrome (3332110112333).

Subtracting 1211100101212 from its reverse (2121010011121), we obtain a palindrome (909909909909).

The spelling of 1211100101212 in words is "one trillion, two hundred eleven billion, one hundred million, one hundred one thousand, two hundred twelve".