1211210211212 has 12 divisors (see below), whose sum is σ = 2119724006400. Its totient is φ = 605574780816.

The previous prime is 1211210211163. The next prime is 1211210211223. The reversal of 1211210211212 is 2121120121121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7491212 + ... + 7651187.

It is an arithmetic number, because the mean of its divisors is an integer number (176643667200).

Almost surely, 2^{1211210211212} is an apocalyptic number.

It is an amenable number.

1211210211212 is a deficient number, since it is larger than the sum of its proper divisors (908513795188).

1211210211212 is a wasteful number, since it uses less digits than its factorization.

1211210211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15162400 (or 15162398 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1211210211212 its reverse (2121120121121), we get a palindrome (3332330332333).

Subtracting 1211210211212 from its reverse (2121120121121), we obtain a palindrome (909909909909).

The spelling of 1211210211212 in words is "one trillion, two hundred eleven billion, two hundred ten million, two hundred eleven thousand, two hundred twelve".