11001221201020 has 24 divisors (see below), whose sum is σ = 23538461968224. Its totient is φ = 4317460395456.

The previous prime is 11001221200987. The next prime is 11001221201063. The reversal of 11001221201020 is 2010212210011.

11001221201020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5189254224 + ... + 5189256343.

It is an arithmetic number, because the mean of its divisors is an integer number (980769248676).

Almost surely, 2^{11001221201020} is an apocalyptic number.

11001221201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11001221201020 is an abundant number, since it is smaller than the sum of its proper divisors (12537240767204).

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

11001221201020 is a wasteful number, since it uses less digits than its factorization.

11001221201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10378510629 (or 10378510627 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11001221201020 its reverse (2010212210011), we get a palindrome (13011433411031).

The spelling of 11001221201020 in words is "eleven trillion, one billion, two hundred twenty-one million, two hundred one thousand, twenty".