11121222020 has 12 divisors (see below), whose sum is σ = 23354566284. Its totient is φ = 4448488800.

The previous prime is 11121221983. The next prime is 11121222023. The reversal of 11121222020 is 2022212111.

It can be written as a sum of positive squares in 2 ways, for example, as 6453872896 + 4667349124 = 80336^2 + 68318^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11121221986 and 11121222004.

It is not an unprimeable number, because it can be changed into a prime (11121222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278030531 + ... + 278030570.

It is an arithmetic number, because the mean of its divisors is an integer number (1946213857).

Almost surely, 2^11121222020 is an apocalyptic number.

11121222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121222020 is an abundant number, since it is smaller than the sum of its proper divisors (12233344264).

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

11121222020 is a wasteful number, since it uses less digits than its factorization.

11121222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556061110 (or 556061108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 11121222020 its reverse (2022212111), we get a palindrome (13143434131).

Subtracting from 11121222020 its reverse (2022212111), we obtain a palindrome (9099009909).

The spelling of 11121222020 in words is "eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty".