11121221120020 has 24 divisors (see below), whose sum is σ = 25477706566368. Its totient is φ = 4044080407200.

The previous prime is 11121221120017. The next prime is 11121221120077. The reversal of 11121221120020 is 2002112212111.

It is a junction number, because it is equal to n+sod(n) for n = 11121221119976 and 11121221120003.

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, 25275502326 + ... + 25275502765.

It is an arithmetic number, because the mean of its divisors is an integer number (1061571106932).

Almost surely, 2^{11121221120020} is an apocalyptic number.

11121221120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121221120020 is an abundant number, since it is smaller than the sum of its proper divisors (14356485446348).

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

11121221120020 is a wasteful number, since it uses less digits than its factorization.

11121221120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50551005111 (or 50551005109 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11121221120020 its reverse (2002112212111), we get a palindrome (13123333332131).

The spelling of 11121221120020 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, twenty".