11112021020 has 48 divisors (see below), whose sum is σ = 23705256960. Its totient is φ = 4374452544.

The previous prime is 11112021017. The next prime is 11112021029. The reversal of 11112021020 is 2012021111.

It is a super-2 number, since 2×11112021020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11112020992 and 11112021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112021029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1764317 + ... + 1770603.

It is an arithmetic number, because the mean of its divisors is an integer number (493859520).

Almost surely, 2^11112021020 is an apocalyptic number.

11112021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112021020 is an abundant number, since it is smaller than the sum of its proper divisors (12593235940).

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

11112021020 is a wasteful number, since it uses less digits than its factorization.

11112021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7682 (or 7680 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11112021020 its reverse (2012021111), we get a palindrome (13124042131).

Subtracting from 11112021020 its reverse (2012021111), we obtain a palindrome (9099999909).

The spelling of 11112021020 in words is "eleven billion, one hundred twelve million, twenty-one thousand, twenty".