11031220020 has 24 divisors (see below), whose sum is σ = 30887416224. Its totient is φ = 2941658656.

The previous prime is 11031220001. The next prime is 11031220037. The reversal of 11031220020 is 2002213011.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11031219978 and 11031220005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91926774 + ... + 91926893.

It is an arithmetic number, because the mean of its divisors is an integer number (1286975676).

Almost surely, 2^11031220020 is an apocalyptic number.

11031220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11031220020 is an abundant number, since it is smaller than the sum of its proper divisors (19856196204).

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

11031220020 is a wasteful number, since it uses less digits than its factorization.

11031220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183853679 (or 183853677 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 11031220020 its reverse (2002213011), we get a palindrome (13033433031).

The spelling of 11031220020 in words is "eleven billion, thirty-one million, two hundred twenty thousand, twenty".