11000001020 has 24 divisors (see below), whose sum is σ = 23896555200. Its totient is φ = 4248276032.

The previous prime is 11000001007. The next prime is 11000001053. The reversal of 11000001020 is 2010000011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 11000000995 and 11000001013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9482180 + ... + 9483339.

It is an arithmetic number, because the mean of its divisors is an integer number (995689800).

Almost surely, 2^11000001020 is an apocalyptic number.

11000001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11000001020 is an abundant number, since it is smaller than the sum of its proper divisors (12896554180).

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

11000001020 is a wasteful number, since it uses less digits than its factorization.

11000001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18965557 (or 18965555 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 11000001020 its reverse (2010000011), we get a palindrome (13010001031).

The spelling of 11000001020 in words is "eleven billion, one thousand, twenty".