1211210111212 has 6 divisors (see below), whose sum is σ = 2119617694628. Its totient is φ = 605605055604.

The previous prime is 1211210111203. The next prime is 1211210111213. The reversal of 1211210111212 is 2121110121121.

It is not an unprimeable number, because it can be changed into a prime (1211210111213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151401263898 + ... + 151401263905.

Almost surely, 2^{1211210111212} is an apocalyptic number.

It is an amenable number.

1211210111212 is a deficient number, since it is larger than the sum of its proper divisors (908407583416).

1211210111212 is a wasteful number, since it uses less digits than its factorization.

1211210111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302802527807 (or 302802527805 counting only the distinct ones).

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

Adding to 1211210111212 its reverse (2121110121121), we get a palindrome (3332320232333).

Subtracting 1211210111212 from its reverse (2121110121121), we obtain a palindrome (909900009909).

The spelling of 1211210111212 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred eleven thousand, two hundred twelve".