11122121212 has 24 divisors (see below), whose sum is σ = 19680781680. Its totient is φ = 5499177600.

The previous prime is 11122121149. The next prime is 11122121221. The reversal of 11122121212 is 21212122111.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317464 + ... + 350752.

It is an arithmetic number, because the mean of its divisors is an integer number (820032570).

Almost surely, 2^11122121212 is an apocalyptic number.

It is an amenable number.

11122121212 is a deficient number, since it is larger than the sum of its proper divisors (8558660468).

11122121212 is a wasteful number, since it uses less digits than its factorization.

11122121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34221 (or 34219 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

Adding to 11122121212 its reverse (21212122111), we get a palindrome (32334243323).

The spelling of 11122121212 in words is "eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".