11001101011220 has 144 divisors (see below), whose sum is σ = 24729055545600. Its totient is φ = 4109700291840.

The previous prime is 11001101011213. The next prime is 11001101011223. The reversal of 11001101011220 is 2211010110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001101011223) 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, 377006591 + ... + 377035769.

It is an arithmetic number, because the mean of its divisors is an integer number (171729552400).

Almost surely, 2^{11001101011220} is an apocalyptic number.

11001101011220 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 11001101011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12364527772800).

11001101011220 is an abundant number, since it is smaller than the sum of its proper divisors (13727954534380).

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

11001101011220 is a wasteful number, since it uses less digits than its factorization.

11001101011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29966 (or 29945 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11001101011220 its reverse (2211010110011), we get a palindrome (13212111121231).

The spelling of 11001101011220 in words is "eleven trillion, one billion, one hundred one million, eleven thousand, two hundred twenty".