11220101112 has 128 divisors (see below), whose sum is σ = 32159381760. Its totient is φ = 3231083520.

The previous prime is 11220101107. The next prime is 11220101161. The reversal of 11220101112 is 21110102211.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 406668 + ... + 433380.

It is an arithmetic number, because the mean of its divisors is an integer number (251245170).

Almost surely, 2^11220101112 is an apocalyptic number.

11220101112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11220101112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16079690880).

11220101112 is an abundant number, since it is smaller than the sum of its proper divisors (20939280648).

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

11220101112 is a wasteful number, since it uses less digits than its factorization.

11220101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26813 (or 26809 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11220101112 its reverse (21110102211), we get a palindrome (32330203323).

The spelling of 11220101112 in words is "eleven billion, two hundred twenty million, one hundred one thousand, one hundred twelve".