11211221200120 has 32 divisors (see below), whose sum is σ = 25239363836400. Its totient is φ = 4481978944768.

The previous prime is 11211221200099. The next prime is 11211221200159. The reversal of 11211221200120 is 2100212211211.

11211221200120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11211221200094 and 11211221200103.

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, 78350605 + ... + 78493564.

Almost surely, 2^{11211221200120} is an apocalyptic number.

11211221200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211221200120 is an abundant number, since it is smaller than the sum of its proper divisors (14028142636280).

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

11211221200120 is a wasteful number, since it uses less digits than its factorization.

11211221200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156845967 (or 156845963 counting only the distinct ones).

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

Adding to 11211221200120 its reverse (2100212211211), we get a palindrome (13311433411331).

The spelling of 11211221200120 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, two hundred thousand, one hundred twenty".