11221212012 has 12 divisors (see below), whose sum is σ = 26182828056. Its totient is φ = 3740404000.

The previous prime is 11221212007. The next prime is 11221212019. The reversal of 11221212012 is 21021212211.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 11221211982 and 11221212000.

It is not an unprimeable number, because it can be changed into a prime (11221212019) 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, 467550489 + ... + 467550512.

It is an arithmetic number, because the mean of its divisors is an integer number (2181902338).

Almost surely, 2^11221212012 is an apocalyptic number.

11221212012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11221212012 is an abundant number, since it is smaller than the sum of its proper divisors (14961616044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221212012 is a wasteful number, since it uses less digits than its factorization.

11221212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935101008 (or 935101006 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11221212012 its reverse (21021212211), we get a palindrome (32242424223).

The spelling of 11221212012 in words is "eleven billion, two hundred twenty-one million, two hundred twelve thousand, twelve".