11200021001001 has 12 divisors (see below), whose sum is σ = 18488923557312. Its totient is φ = 6400012000536.

The previous prime is 11200021000991. The next prime is 11200021001009. The reversal of 11200021001001 is 10010012000211.

It is a happy number.

It is not a de Polignac number, because 11200021001001 - 2¹⁷ = 11200020869929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (11200021001009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88889055501 + ... + 88889055626.

It is an arithmetic number, because the mean of its divisors is an integer number (1540743629776).

Almost surely, 2^{11200021001001} is an apocalyptic number.

It is an amenable number.

11200021001001 is a deficient number, since it is larger than the sum of its proper divisors (7288902556311).

11200021001001 is a wasteful number, since it uses less digits than its factorization.

11200021001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177778111140 (or 177778111137 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11200021001001 its reverse (10010012000211), we get a palindrome (21210033001212).

The spelling of 11200021001001 in words is "eleven trillion, two hundred billion, twenty-one million, one thousand, one".