11221221102 has 96 divisors (see below), whose sum is σ = 28524529152. Its totient is φ = 2879390592.

The previous prime is 11221221101. The next prime is 11221221103. The reversal of 11221221102 is 20112212211.

It is an interprime number because it is at equal distance from previous prime (11221221101) and next prime (11221221103).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221221101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 241263 + ... + 283989.

It is an arithmetic number, because the mean of its divisors is an integer number (297130512).

Almost surely, 2^11221221102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11221221102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14262264576).

11221221102 is an abundant number, since it is smaller than the sum of its proper divisors (17303308050).

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

11221221102 is a wasteful number, since it uses less digits than its factorization.

11221221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42802 (or 42789 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11221221102 its reverse (20112212211), we get a palindrome (31333433313).

The spelling of 11221221102 in words is "eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred two".