11011001210020 has 192 divisors, whose sum is σ = 27583292620800. Its totient is φ = 3612865651200.

The previous prime is 11011001210017. The next prime is 11011001210021. The reversal of 11011001210020 is 2001210011011.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11011001209979 and 11011001210006.

It is not an unprimeable number, because it can be changed into a prime (11011001210021) 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, 146754315 + ... + 146829325.

It is an arithmetic number, because the mean of its divisors is an integer number (143662982400).

Almost surely, 2^{11011001210020} is an apocalyptic number.

11011001210020 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 11011001210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13791646310400).

11011001210020 is an abundant number, since it is smaller than the sum of its proper divisors (16572291410780).

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

11011001210020 is a wasteful number, since it uses less digits than its factorization.

11011001210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75434 (or 75432 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11011001210020 its reverse (2001210011011), we get a palindrome (13012211221031).

The spelling of 11011001210020 in words is "eleven trillion, eleven billion, one million, two hundred ten thousand, twenty".