11111011020 has 72 divisors (see below), whose sum is σ = 33863247600. Its totient is φ = 2948883840.

The previous prime is 11111010997. The next prime is 11111011061. The reversal of 11111011020 is 2011011111.

It is a super-2 number, since 2×11111011020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11111010993 and 11111011011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108295 + ... + 184254.

Almost surely, 2^11111011020 is an apocalyptic number.

11111011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111011020 is an abundant number, since it is smaller than the sum of its proper divisors (22752236580).

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

11111011020 is a wasteful number, since it uses less digits than its factorization.

11111011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292775 (or 292770 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11111011020 its reverse (2011011111), we get a palindrome (13122022131).

Subtracting from 11111011020 its reverse (2011011111), we obtain a palindrome (9099999909).

The spelling of 11111011020 in words is "eleven billion, one hundred eleven million, eleven thousand, twenty".