11121212211020 has 24 divisors (see below), whose sum is σ = 23410284433200. Its totient is φ = 4437867972032.

The previous prime is 11121212211007. The next prime is 11121212211029. The reversal of 11121212211020 is 2011221212111.

It is a super-2 number, since 2×11121212211020² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11121212211020.

It is not an unprimeable number, because it can be changed into a prime (11121212211029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663548435 + ... + 663565194.

It is an arithmetic number, because the mean of its divisors is an integer number (975428518050).

Almost surely, 2^{11121212211020} is an apocalyptic number.

11121212211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121212211020 is an abundant number, since it is smaller than the sum of its proper divisors (12289072222180).

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

11121212211020 is a wasteful number, since it uses less digits than its factorization.

11121212211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327114057 (or 1327114055 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11121212211020 its reverse (2011221212111), we get a palindrome (13132433423131).

The spelling of 11121212211020 in words is "eleven trillion, one hundred twenty-one billion, two hundred twelve million, two hundred eleven thousand, twenty".