12111011212 has 6 divisors (see below), whose sum is σ = 21194269628. Its totient is φ = 6055505604.

The previous prime is 12111011201. The next prime is 12111011221. The reversal of 12111011212 is 21211011121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12111011192 and 12111011201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1513876398 + ... + 1513876405.

Almost surely, 2^12111011212 is an apocalyptic number.

It is an amenable number.

12111011212 is a deficient number, since it is larger than the sum of its proper divisors (9083258416).

12111011212 is a wasteful number, since it uses less digits than its factorization.

12111011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027752807 (or 3027752805 counting only the distinct ones).

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

Adding to 12111011212 its reverse (21211011121), we get a palindrome (33322022333).

Subtracting 12111011212 from its reverse (21211011121), we obtain a palindrome (9099999909).

The spelling of 12111011212 in words is "twelve billion, one hundred eleven million, eleven thousand, two hundred twelve".