111211111211212 has 6 divisors (see below), whose sum is σ = 194619444619628. Its totient is φ = 55605555605604.

The previous prime is 111211111211153. The next prime is 111211111211243. The reversal of 111211111211212 is 212112111112111.

It is a super-2 number, since 2×111211111211212² (a number of 29 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 111211111211212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13901388901398 + ... + 13901388901405.

Almost surely, 2^{111211111211212} is an apocalyptic number.

It is an amenable number.

111211111211212 is a deficient number, since it is larger than the sum of its proper divisors (83408333408416).

111211111211212 is a wasteful number, since it uses less digits than its factorization.

111211111211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27802777802807 (or 27802777802805 counting only the distinct ones).

The product of its digits is 16, while the sum is 19.

Adding to 111211111211212 its reverse (212112111112111), we get a palindrome (323323222323323).

The spelling of 111211111211212 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred eleven million, two hundred eleven thousand, two hundred twelve".