11111030020 has 12 divisors (see below), whose sum is σ = 23333163084. Its totient is φ = 4444412000.

The previous prime is 11111030009. The next prime is 11111030039. The reversal of 11111030020 is 2003011111.

It can be written as a sum of positive squares in 2 ways, for example, as 5467715136 + 5643314884 = 73944^2 + 75122^2 .

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 = 11111029979 and 11111030006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277775731 + ... + 277775770.

It is an arithmetic number, because the mean of its divisors is an integer number (1944430257).

Almost surely, 2^11111030020 is an apocalyptic number.

11111030020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111030020 is an abundant number, since it is smaller than the sum of its proper divisors (12222133064).

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

11111030020 is a wasteful number, since it uses less digits than its factorization.

11111030020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555551510 (or 555551508 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 11111030020 its reverse (2003011111), we get a palindrome (13114041131).

The spelling of 11111030020 in words is "eleven billion, one hundred eleven million, thirty thousand, twenty".