12111212212 has 48 divisors (see below), whose sum is σ = 24190451712. Its totient is φ = 5251827680.

The previous prime is 12111212209. The next prime is 12111212213. The reversal of 12111212212 is 21221211121.

It is a super-2 number, since 2×12111212212² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111212213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371973 + ... + 403219.

It is an arithmetic number, because the mean of its divisors is an integer number (503967744).

Almost surely, 2^12111212212 is an apocalyptic number.

It is an amenable number.

12111212212 is a deficient number, since it is larger than the sum of its proper divisors (12079239500).

12111212212 is a wasteful number, since it uses less digits than its factorization.

12111212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31668 (or 31666 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

Adding to 12111212212 its reverse (21221211121), we get a palindrome (33332423333).

The spelling of 12111212212 in words is "twelve billion, one hundred eleven million, two hundred twelve thousand, two hundred twelve".