11023221020 has 48 divisors (see below), whose sum is σ = 26470499328. Its totient is φ = 3777280320.

The previous prime is 11023220993. The next prime is 11023221023. The reversal of 11023221020 is 2012232011.

It is a happy number.

It is a super-2 number, since 2×11023221020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 11023220986 and 11023221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11023221023) 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, 240899 + ... + 282981.

It is an arithmetic number, because the mean of its divisors is an integer number (551468736).

Almost surely, 2^11023221020 is an apocalyptic number.

11023221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11023221020 is an abundant number, since it is smaller than the sum of its proper divisors (15447278308).

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

11023221020 is a wasteful number, since it uses less digits than its factorization.

11023221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43970 (or 43968 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 11023221020 its reverse (2012232011), we get a palindrome (13035453031).

The spelling of 11023221020 in words is "eleven billion, twenty-three million, two hundred twenty-one thousand, twenty".