11010121220 has 24 divisors (see below), whose sum is σ = 26424291264. Its totient is φ = 3774898656.

The previous prime is 11010121163. The next prime is 11010121249. The reversal of 11010121220 is 2212101011.

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, 39321722 + ... + 39322001.

It is an arithmetic number, because the mean of its divisors is an integer number (1101012136).

Almost surely, 2^11010121220 is an apocalyptic number.

11010121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11010121220 is an abundant number, since it is smaller than the sum of its proper divisors (15414170044).

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

11010121220 is a wasteful number, since it uses less digits than its factorization.

11010121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78643739 (or 78643737 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11010121220 its reverse (2212101011), we get a palindrome (13222222231).

The spelling of 11010121220 in words is "eleven billion, ten million, one hundred twenty-one thousand, two hundred twenty".