11221222020 has 48 divisors (see below), whose sum is σ = 31536267840. Its totient is φ = 2981197696.

The previous prime is 11221222007. The next prime is 11221222021. The reversal of 11221222020 is 2022212211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (11221222021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331482 + ... + 363761.

It is an arithmetic number, because the mean of its divisors is an integer number (657005580).

Almost surely, 2^11221222020 is an apocalyptic number.

11221222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221222020 is an abundant number, since it is smaller than the sum of its proper divisors (20315045820).

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

11221222020 is a wasteful number, since it uses less digits than its factorization.

11221222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695524 (or 695522 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 11221222020 its reverse (2022212211), we get a palindrome (13243434231).

The spelling of 11221222020 in words is "eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty".