11213000020 has 96 divisors (see below), whose sum is σ = 25107667200. Its totient is φ = 4197473280.

The previous prime is 11212999991. The next prime is 11213000027. The reversal of 11213000020 is 2000031211.

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 = 11212999970 and 11213000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213000027) 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, 4397706 + ... + 4400254.

It is an arithmetic number, because the mean of its divisors is an integer number (261538200).

Almost surely, 2^11213000020 is an apocalyptic number.

11213000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11213000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12553833600).

11213000020 is an abundant number, since it is smaller than the sum of its proper divisors (13894667180).

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

11213000020 is a wasteful number, since it uses less digits than its factorization.

11213000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785 (or 2783 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 11213000020 its reverse (2000031211), we get a palindrome (13213031231).

The spelling of 11213000020 in words is "eleven billion, two hundred thirteen million, twenty", and thus it is an aban number.