11222121212 has 12 divisors (see below), whose sum is σ = 19679714880. Its totient is φ = 5599345536.

The previous prime is 11222121173. The next prime is 11222121217. The reversal of 11222121212 is 21212122211.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222121217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2926613 + ... + 2930444.

It is an arithmetic number, because the mean of its divisors is an integer number (1639976240).

Almost surely, 2^11222121212 is an apocalyptic number.

It is an amenable number.

11222121212 is a deficient number, since it is larger than the sum of its proper divisors (8457593668).

11222121212 is a wasteful number, since it uses less digits than its factorization.

11222121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5857540 (or 5857538 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

Adding to 11222121212 its reverse (21212122211), we get a palindrome (32434243423).

Subtracting 11222121212 from its reverse (21212122211), we obtain a palindrome (9990000999).

The spelling of 11222121212 in words is "eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".