11211220220109 has 64 divisors (see below), whose sum is σ = 19457995253760. Its totient is φ = 5575815947520.

The previous prime is 11211220220029. The next prime is 11211220220129. The reversal of 11211220220109 is 90102202211211.

It is not a de Polignac number, because 11211220220109 - 2³¹ = 11209072736461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211220220129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4027362 + ... + 6216275.

It is an arithmetic number, because the mean of its divisors is an integer number (304031175840).

Almost surely, 2^{11211220220109} is an apocalyptic number.

11211220220109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11211220220109 is a deficient number, since it is larger than the sum of its proper divisors (8246775033651).

11211220220109 is a wasteful number, since it uses less digits than its factorization.

11211220220109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10243890.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 11211220220109 in words is "eleven trillion, two hundred eleven billion, two hundred twenty million, two hundred twenty thousand, one hundred nine".