1111100020 has 12 divisors (see below), whose sum is σ = 2333310084. Its totient is φ = 444440000.

The previous prime is 1111099981. The next prime is 1111100021. The reversal of 1111100020 is 200011111.

It can be written as a sum of positive squares in 2 ways, for example, as 675376144 + 435723876 = 25988^2 + 20874^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1111099976 and 1111100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111100021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27777481 + ... + 27777520.

It is an arithmetic number, because the mean of its divisors is an integer number (194442507).

Almost surely, 2^1111100020 is an apocalyptic number.

1111100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111100020 is an abundant number, since it is smaller than the sum of its proper divisors (1222210064).

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

1111100020 is a wasteful number, since it uses less digits than its factorization.

1111100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55555010 (or 55555008 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1111100020 is about 33333.1669662515. The cubic root of 1111100020 is about 1035.7407223737.

Adding to 1111100020 its reverse (200011111), we get a palindrome (1311111131).

The spelling of 1111100020 in words is "one billion, one hundred eleven million, one hundred thousand, twenty".