11221223312 has 40 divisors (see below), whose sum is σ = 23489913216. Its totient is φ = 5162126976.

The previous prime is 11221223309. The next prime is 11221223317. The reversal of 11221223312 is 21332212211.

It is not an unprimeable number, because it can be changed into a prime (11221223317) 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, 24008 + ... + 151719.

Almost surely, 2^11221223312 is an apocalyptic number.

It is an amenable number.

11221223312 is an abundant number, since it is smaller than the sum of its proper divisors (12268689904).

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

11221223312 is a wasteful number, since it uses less digits than its factorization.

11221223312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176055 (or 176049 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 11221223312 its reverse (21332212211), we get a palindrome (32553435523).

The spelling of 11221223312 in words is "eleven billion, two hundred twenty-one million, two hundred twenty-three thousand, three hundred twelve".