11112010221820 has 24 divisors (see below), whose sum is σ = 23336519992128. Its totient is φ = 4444556750400.

The previous prime is 11112010221803. The next prime is 11112010221821. The reversal of 11112010221820 is 2812201021111.

It is a happy number.

11112010221820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11112010221820² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11112010221791 and 11112010221800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112010221821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15090036 + ... + 15809275.

It is an arithmetic number, because the mean of its divisors is an integer number (972354999672).

Almost surely, 2^{11112010221820} is an apocalyptic number.

11112010221820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112010221820 is an abundant number, since it is smaller than the sum of its proper divisors (12224509770308).

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

11112010221820 is a wasteful number, since it uses less digits than its factorization.

11112010221820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30917301 (or 30917299 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 11112010221820 its reverse (2812201021111), we get a palindrome (13924211242931).

The spelling of 11112010221820 in words is "eleven trillion, one hundred twelve billion, ten million, two hundred twenty-one thousand, eight hundred twenty".