12111110001212 has 18 divisors (see below), whose sum is σ = 21559758973368. Its totient is φ = 5952918468328.

The previous prime is 12111110001197. The next prime is 12111110001217. The reversal of 12111110001212 is 21210001111121.

It is a super-2 number, since 2×12111110001212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111110001217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 434886608 + ... + 434914455.

Almost surely, 2^{12111110001212} is an apocalyptic number.

It is an amenable number.

12111110001212 is a deficient number, since it is larger than the sum of its proper divisors (9448648972156).

12111110001212 is an equidigital number, since it uses as much as digits as its factorization.

12111110001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869801185 (or 869801124 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12111110001212 its reverse (21210001111121), we get a palindrome (33321111112333).

The spelling of 12111110001212 in words is "twelve trillion, one hundred eleven billion, one hundred ten million, one thousand, two hundred twelve".