11101210020 has 144 divisors (see below), whose sum is σ = 34552103040. Its totient is φ = 2883340800.

The previous prime is 11101209929. The next prime is 11101210027. The reversal of 11101210020 is 2001210111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11101209984 and 11101210011.

It is not an unprimeable number, because it can be changed into a prime (11101210027) 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, 7608051 + ... + 7609509.

It is an arithmetic number, because the mean of its divisors is an integer number (239945160).

Almost surely, 2^11101210020 is an apocalyptic number.

11101210020 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 11101210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17276051520).

11101210020 is an abundant number, since it is smaller than the sum of its proper divisors (23450893020).

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

11101210020 is a wasteful number, since it uses less digits than its factorization.

11101210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546 (or 2541 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11101210020 its reverse (2001210111), we get a palindrome (13102420131).

Subtracting from 11101210020 its reverse (2001210111), we obtain a palindrome (9099999909).

The spelling of 11101210020 in words is "eleven billion, one hundred one million, two hundred ten thousand, twenty".