11211020002120 has 64 divisors (see below), whose sum is σ = 26039180160000. Its totient is φ = 4339635997440.

The previous prime is 11211020002103. The next prime is 11211020002129. The reversal of 11211020002120 is 2120002011211.

It is a self number, because there is not a number n which added to its sum of digits gives 11211020002120.

It is not an unprimeable number, because it can be changed into a prime (11211020002129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59223381 + ... + 59412379.

It is an arithmetic number, because the mean of its divisors is an integer number (406862190000).

Almost surely, 2^{11211020002120} is an apocalyptic number.

11211020002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211020002120 is an abundant number, since it is smaller than the sum of its proper divisors (14828160157880).

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

11211020002120 is a wasteful number, since it uses less digits than its factorization.

11211020002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236878 (or 236874 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11211020002120 its reverse (2120002011211), we get a palindrome (13331022013331).

The spelling of 11211020002120 in words is "eleven trillion, two hundred eleven billion, twenty million, two thousand, one hundred twenty".