111210121211212 has 6 divisors (see below), whose sum is σ = 194617712119628. Its totient is φ = 55605060605604.

The previous prime is 111210121211209. The next prime is 111210121211243. The reversal of 111210121211212 is 212112121012111.

It is a self number, because there is not a number n which added to its sum of digits gives 111210121211212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13901265151398 + ... + 13901265151405.

Almost surely, 2^{111210121211212} is an apocalyptic number.

It is an amenable number.

111210121211212 is a deficient number, since it is larger than the sum of its proper divisors (83407590908416).

111210121211212 is a wasteful number, since it uses less digits than its factorization.

111210121211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27802530302807 (or 27802530302805 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111210121211212 its reverse (212112121012111), we get a palindrome (323322242223323).

The spelling of 111210121211212 in words is "one hundred eleven trillion, two hundred ten billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".