11221022212 has 12 divisors (see below), whose sum is σ = 19638230220. Its totient is φ = 5610099296.

The previous prime is 11221022207. The next prime is 11221022231. The reversal of 11221022212 is 21222012211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8743372036 + 2477650176 = 93506^2 + 49776^2 .

It is a super-2 number, since 2×11221022212² (a number of 21 digits) contains 22 as substring.

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, 36943 + ... + 154294.

It is an arithmetic number, because the mean of its divisors is an integer number (1636519185).

Almost surely, 2^11221022212 is an apocalyptic number.

It is an amenable number.

11221022212 is a deficient number, since it is larger than the sum of its proper divisors (8417208008).

11221022212 is a wasteful number, since it uses less digits than its factorization.

11221022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205910 (or 205908 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11221022212 its reverse (21222012211), we get a palindrome (32443034423).

The spelling of 11221022212 in words is "eleven billion, two hundred twenty-one million, twenty-two thousand, two hundred twelve".