11220002020 has 12 divisors (see below), whose sum is σ = 23562004284. Its totient is φ = 4488000800.

The previous prime is 11220001981. The next prime is 11220002041. The reversal of 11220002020 is 2020002211.

It can be written as a sum of positive squares in 2 ways, for example, as 3102712804 + 8117289216 = 55702^2 + 90096^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11220001988 and 11220002006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280500031 + ... + 280500070.

It is an arithmetic number, because the mean of its divisors is an integer number (1963500357).

Almost surely, 2^11220002020 is an apocalyptic number.

11220002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11220002020 is an abundant number, since it is smaller than the sum of its proper divisors (12342002264).

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

11220002020 is a wasteful number, since it uses less digits than its factorization.

11220002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561000110 (or 561000108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 11220002020 its reverse (2020002211), we get a palindrome (13240004231).

The spelling of 11220002020 in words is "eleven billion, two hundred twenty million, two thousand, twenty".