11121210211020 has 576 divisors, whose sum is σ = 40626587473920. Its totient is φ = 2221263323136.

The previous prime is 11121210210967. The next prime is 11121210211063. The reversal of 11121210211020 is 2011201212111.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 158321266 + ... + 158391494.

It is an arithmetic number, because the mean of its divisors is an integer number (70532269920).

Almost surely, 2^{11121210211020} is an apocalyptic number.

11121210211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11121210211020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20313293736960).

11121210211020 is an abundant number, since it is smaller than the sum of its proper divisors (29505377262900).

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

11121210211020 is a wasteful number, since it uses less digits than its factorization.

11121210211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70394 (or 70379 counting only the distinct ones).

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

Adding to 11121210211020 its reverse (2011201212111), we get a palindrome (13132411423131).

The spelling of 11121210211020 in words is "eleven trillion, one hundred twenty-one billion, two hundred ten million, two hundred eleven thousand, twenty".