11111221110212 has 24 divisors (see below), whose sum is σ = 19924383236352. Its totient is φ = 5418614836800.

The previous prime is 11111221110203. The next prime is 11111221110217. The reversal of 11111221110212 is 21201112211111.

It is not an unprimeable number, because it can be changed into a prime (11111221110217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8734088 + ... + 9925055.

It is an arithmetic number, because the mean of its divisors is an integer number (830182634848).

Almost surely, 2^{11111221110212} is an apocalyptic number.

It is an amenable number.

11111221110212 is a deficient number, since it is larger than the sum of its proper divisors (8813162126140).

11111221110212 is a wasteful number, since it uses less digits than its factorization.

11111221110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18662819 (or 18662817 counting only the distinct ones).

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

Adding to 11111221110212 its reverse (21201112211111), we get a palindrome (32312333321323).

The spelling of 11111221110212 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, one hundred ten thousand, two hundred twelve".