11221001212020 has 96 divisors (see below), whose sum is σ = 31746836110080. Its totient is φ = 2961067898880.

The previous prime is 11221001212019. The next prime is 11221001212051. The reversal of 11221001212020 is 2021210012211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7877196 + ... + 9191964.

It is an arithmetic number, because the mean of its divisors is an integer number (330696209480).

Almost surely, 2^{11221001212020} is an apocalyptic number.

11221001212020 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 11221001212020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15873418055040).

11221001212020 is an abundant number, since it is smaller than the sum of its proper divisors (20525834898060).

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

11221001212020 is a wasteful number, since it uses less digits than its factorization.

11221001212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316265 (or 1316263 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11221001212020 its reverse (2021210012211), we get a palindrome (13242211224231).

The spelling of 11221001212020 in words is "eleven trillion, two hundred twenty-one billion, one million, two hundred twelve thousand, twenty".