11221111012 has 12 divisors (see below), whose sum is σ = 19645005996. Its totient is φ = 5608252160.

The previous prime is 11221111003. The next prime is 11221111037. The reversal of 11221111012 is 21011112211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7285305316 + 3935805696 = 85354^2 + 62736^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11221110983 and 11221111001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564853 + ... + 584380.

It is an arithmetic number, because the mean of its divisors is an integer number (1637083833).

Almost surely, 2^11221111012 is an apocalyptic number.

It is an amenable number.

11221111012 is a deficient number, since it is larger than the sum of its proper divisors (8423894984).

11221111012 is a wasteful number, since it uses less digits than its factorization.

11221111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151678 (or 1151676 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11221111012 its reverse (21011112211), we get a palindrome (32232223223).

The spelling of 11221111012 in words is "eleven billion, two hundred twenty-one million, one hundred eleven thousand, twelve".