11001222121020 has 96 divisors (see below), whose sum is σ = 32425374401280. Its totient is φ = 2779194424320.

The previous prime is 11001222120989. The next prime is 11001222121031. The reversal of 11001222121020 is 2012122210011.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73378735 + ... + 73528505.

It is an arithmetic number, because the mean of its divisors is an integer number (337764316680).

Almost surely, 2^{11001222121020} is an apocalyptic number.

11001222121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11001222121020 is an abundant number, since it is smaller than the sum of its proper divisors (21424152280260).

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

11001222121020 is a wasteful number, since it uses less digits than its factorization.

11001222121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214235 (or 214233 counting only the distinct ones).

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

Adding to 11001222121020 its reverse (2012122210011), we get a palindrome (13013344331031).

The spelling of 11001222121020 in words is "eleven trillion, one billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty".