11321020020 has 24 divisors (see below), whose sum is σ = 31698856224. Its totient is φ = 3018938656.

The previous prime is 11321020019. The next prime is 11321020037. The reversal of 11321020020 is 2002012311.

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 = 11321019978 and 11321020005.

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, 94341774 + ... + 94341893.

It is an arithmetic number, because the mean of its divisors is an integer number (1320785676).

Almost surely, 2^11321020020 is an apocalyptic number.

11321020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11321020020 is an abundant number, since it is smaller than the sum of its proper divisors (20377836204).

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

11321020020 is a wasteful number, since it uses less digits than its factorization.

11321020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188683679 (or 188683677 counting only the distinct ones).

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

Adding to 11321020020 its reverse (2002012311), we get a palindrome (13323032331).

The spelling of 11321020020 in words is "eleven billion, three hundred twenty-one million, twenty thousand, twenty".