11221221022 has 32 divisors (see below), whose sum is σ = 18706754304. Its totient is φ = 5005608000.

The previous prime is 11221221019. The next prime is 11221221029. The reversal of 11221221022 is 22012212211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11221220987 and 11221221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221221029) 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, 255378 + ... + 296074.

It is an arithmetic number, because the mean of its divisors is an integer number (584586072).

Almost surely, 2^11221221022 is an apocalyptic number.

11221221022 is a deficient number, since it is larger than the sum of its proper divisors (7485533282).

11221221022 is a wasteful number, since it uses less digits than its factorization.

11221221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40944.

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

Adding to 11221221022 its reverse (22012212211), we get a palindrome (33233433233).

The spelling of 11221221022 in words is "eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-two".