11220100020 has 96 divisors (see below), whose sum is σ = 36744220800. Its totient is φ = 2834548992.

The previous prime is 11220100019. The next prime is 11220100027. The reversal of 11220100020 is 2000102211.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11220099975 and 11220100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220100027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 536529 + ... + 557048.

It is an arithmetic number, because the mean of its divisors is an integer number (382752300).

Almost surely, 2^11220100020 is an apocalyptic number.

11220100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11220100020 is an abundant number, since it is smaller than the sum of its proper divisors (25524120780).

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

11220100020 is a wasteful number, since it uses less digits than its factorization.

11220100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093614 (or 1093606 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 11220100020 its reverse (2000102211), we get a palindrome (13220202231).

The spelling of 11220100020 in words is "eleven billion, two hundred twenty million, one hundred thousand, twenty".