11201121211020 has 96 divisors (see below), whose sum is σ = 33777165938880. Its totient is φ = 2757078466560.

The previous prime is 11201121211013. The next prime is 11201121211057. The reversal of 11201121211020 is 2011212110211.

It is a happy number.

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

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, 18231396 + ... + 18835764.

It is an arithmetic number, because the mean of its divisors is an integer number (351845478530).

Almost surely, 2^{11201121211020} is an apocalyptic number.

11201121211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11201121211020 is an abundant number, since it is smaller than the sum of its proper divisors (22576044727860).

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

11201121211020 is a wasteful number, since it uses less digits than its factorization.

11201121211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628155 (or 628153 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11201121211020 its reverse (2011212110211), we get a palindrome (13212333321231).

It can be divided in two parts, 1 and 1201121211020, that added together give a palindrome (1201121211021).

The spelling of 11201121211020 in words is "eleven trillion, two hundred one billion, one hundred twenty-one million, two hundred eleven thousand, twenty".