11012012111220 has 24 divisors (see below), whose sum is σ = 30833633911584. Its totient is φ = 2936536562976.

The previous prime is 11012012111167. The next prime is 11012012111231. The reversal of 11012012111220 is 2211121021011.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11012012111220.

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 7 ways as a sum of consecutive naturals, for example, 91766767534 + ... + 91766767653.

It is an arithmetic number, because the mean of its divisors is an integer number (1284734746316).

Almost surely, 2^{11012012111220} is an apocalyptic number.

11012012111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11012012111220 is an abundant number, since it is smaller than the sum of its proper divisors (19821621800364).

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

11012012111220 is a wasteful number, since it uses less digits than its factorization.

11012012111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183533535199 (or 183533535197 counting only the distinct ones).

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

Adding to 11012012111220 its reverse (2211121021011), we get a palindrome (13223133132231).

The spelling of 11012012111220 in words is "eleven trillion, twelve billion, twelve million, one hundred eleven thousand, two hundred twenty".