11200021001 has 4 divisors (see below), whose sum is σ = 12061561092. Its totient is φ = 10338480912.

The previous prime is 11200020977. The next prime is 11200021033. The reversal of 11200021001 is 10012000211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1204020601 + 9996000400 = 34699^2 + 99980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11200021001 is a prime.

It is a super-3 number, since 3×11200021001³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11200021001.

It is not an unprimeable number, because it can be changed into a prime (11200021501) 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, 430770026 + ... + 430770051.

It is an arithmetic number, because the mean of its divisors is an integer number (3015390273).

Almost surely, 2^11200021001 is an apocalyptic number.

It is an amenable number.

11200021001 is a deficient number, since it is larger than the sum of its proper divisors (861540091).

11200021001 is an equidigital number, since it uses as much as digits as its factorization.

11200021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861540090.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 11200021001 its reverse (10012000211), we get a palindrome (21212021212).

The spelling of 11200021001 in words is "eleven billion, two hundred million, twenty-one thousand, one".