11221211212 has 12 divisors (see below), whose sum is σ = 19662528816. Its totient is φ = 5603345840.

The previous prime is 11221211171. The next prime is 11221211219. The reversal of 11221211212 is 21211212211.

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

It is not an unprimeable number, because it can be changed into a prime (11221211219) 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, 1811464 + ... + 1817647.

It is an arithmetic number, because the mean of its divisors is an integer number (1638544068).

Almost surely, 2^11221211212 is an apocalyptic number.

It is an amenable number.

11221211212 is a deficient number, since it is larger than the sum of its proper divisors (8441317604).

11221211212 is a wasteful number, since it uses less digits than its factorization.

11221211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629888 (or 3629886 counting only the distinct ones).

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

Adding to 11221211212 its reverse (21211212211), we get a palindrome (32432423423).

Subtracting 11221211212 from its reverse (21211212211), we obtain a palindrome (9990000999).

The spelling of 11221211212 in words is "eleven billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twelve".