11111210211212 has 12 divisors (see below), whose sum is σ = 19450455364536. Its totient is φ = 5553937249920.

The previous prime is 11111210211109. The next prime is 11111210211281. The reversal of 11111210211212 is 21211201211111.

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 in 3 ways as a sum of consecutive naturals, for example, 416948933 + ... + 416975580.

It is an arithmetic number, because the mean of its divisors is an integer number (1620871280378).

Almost surely, 2^{11111210211212} is an apocalyptic number.

It is an amenable number.

11111210211212 is a deficient number, since it is larger than the sum of its proper divisors (8339245153324).

11111210211212 is a wasteful number, since it uses less digits than its factorization.

11111210211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833927848 (or 833927846 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11111210211212 its reverse (21211201211111), we get a palindrome (32322411422323).

The spelling of 11111210211212 in words is "eleven trillion, one hundred eleven billion, two hundred ten million, two hundred eleven thousand, two hundred twelve".