11220001220100 has 144 divisors (see below), whose sum is σ = 33132990464000. Its totient is φ = 2930865275520.

The previous prime is 11220001220093. The next prime is 11220001220117. The reversal of 11220001220100 is 102210002211.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1146051 + ... + 4873749.

Almost surely, 2^{11220001220100} is an apocalyptic number.

11220001220100 is a gapful number since it is divisible by the number (10) 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 11220001220100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16566495232000).

11220001220100 is an abundant number, since it is smaller than the sum of its proper divisors (21912989243900).

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

11220001220100 is a wasteful number, since it uses less digits than its factorization.

11220001220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727922 (or 3727915 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11220001220100 its reverse (102210002211), we get a palindrome (11322211222311).

The spelling of 11220001220100 in words is "eleven trillion, two hundred twenty billion, one million, two hundred twenty thousand, one hundred".