11001200020 has 24 divisors (see below), whose sum is σ = 23847763968. Its totient is φ = 4258528800.

The previous prime is 11001200011. The next prime is 11001200029. The reversal of 11001200020 is 2000210011.

It is an interprime number because it is at equal distance from previous prime (11001200011) and next prime (11001200029).

It is a junction number, because it is equal to n+sod(n) for n = 11001199976 and 11001200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001200029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8871316 + ... + 8872555.

It is an arithmetic number, because the mean of its divisors is an integer number (993656832).

Almost surely, 2^11001200020 is an apocalyptic number.

11001200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11001200020 is an abundant number, since it is smaller than the sum of its proper divisors (12846563948).

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

11001200020 is a wasteful number, since it uses less digits than its factorization.

11001200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17743911 (or 17743909 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 11001200020 its reverse (2000210011), we get a palindrome (13001410031).

Subtracting from 11001200020 its reverse (2000210011), we obtain a palindrome (9000990009).

The spelling of 11001200020 in words is "eleven billion, one million, two hundred thousand, twenty".