11111021222 has 32 divisors (see below), whose sum is σ = 19191719424. Its totient is φ = 4725864000.

The previous prime is 11111021221. The next prime is 11111021237. The reversal of 11111021222 is 22212011111.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 11111021197 and 11111021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111021221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3234818 + ... + 3238250.

It is an arithmetic number, because the mean of its divisors is an integer number (599741232).

Almost surely, 2^11111021222 is an apocalyptic number.

11111021222 is a deficient number, since it is larger than the sum of its proper divisors (8080698202).

11111021222 is a wasteful number, since it uses less digits than its factorization.

11111021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11111021222 its reverse (22212011111), we get a palindrome (33323032333).

The spelling of 11111021222 in words is "eleven billion, one hundred eleven million, twenty-one thousand, two hundred twenty-two".