11221212111020 has 24 divisors (see below), whose sum is σ = 23963944510800. Its totient is φ = 4412408829632.

The previous prime is 11221212111019. The next prime is 11221212111061. The reversal of 11221212111020 is 2011121212211.

It is a self number, because there is not a number n which added to its sum of digits gives 11221212111020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4754749715 + ... + 4754752074.

It is an arithmetic number, because the mean of its divisors is an integer number (998497687950).

Almost surely, 2^{11221212111020} is an apocalyptic number.

11221212111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221212111020 is an abundant number, since it is smaller than the sum of its proper divisors (12742732399780).

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

11221212111020 is a wasteful number, since it uses less digits than its factorization.

11221212111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9509501857 (or 9509501855 counting only the distinct ones).

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

Adding to 11221212111020 its reverse (2011121212211), we get a palindrome (13232333323231).

The spelling of 11221212111020 in words is "eleven trillion, two hundred twenty-one billion, two hundred twelve million, one hundred eleven thousand, twenty".