11101111221212 has 12 divisors (see below), whose sum is σ = 19700563576176. Its totient is φ = 5472378770880.

The previous prime is 11101111221209. The next prime is 11101111221247. The reversal of 11101111221212 is 21212211110111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19544209613 + ... + 19544210180.

It is an arithmetic number, because the mean of its divisors is an integer number (1641713631348).

Almost surely, 2^{11101111221212} is an apocalyptic number.

It is an amenable number.

11101111221212 is a deficient number, since it is larger than the sum of its proper divisors (8599452354964).

11101111221212 is a wasteful number, since it uses less digits than its factorization.

11101111221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39088419868 (or 39088419866 counting only the distinct ones).

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

Adding to 11101111221212 its reverse (21212211110111), we get a palindrome (32313322331323).

The spelling of 11101111221212 in words is "eleven trillion, one hundred one billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twelve".