11203421212 has 24 divisors (see below), whose sum is σ = 20645452800. Its totient is φ = 5304936816.

The previous prime is 11203421191. The next prime is 11203421219. The reversal of 11203421212 is 21212430211.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 11203421212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11203421219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193203 + ... + 244405.

It is an arithmetic number, because the mean of its divisors is an integer number (860227200).

Almost surely, 2^11203421212 is an apocalyptic number.

It is an amenable number.

11203421212 is a deficient number, since it is larger than the sum of its proper divisors (9442031588).

11203421212 is a wasteful number, since it uses less digits than its factorization.

11203421212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54105 (or 54103 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 11203421212 its reverse (21212430211), we get a palindrome (32415851423).

The spelling of 11203421212 in words is "eleven billion, two hundred three million, four hundred twenty-one thousand, two hundred twelve".