11002021001 has 4 divisors (see below), whose sum is σ = 11110952004. Its totient is φ = 10893090000.

The previous prime is 11002020989. The next prime is 11002021007. The reversal of 11002021001 is 10012020011.

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 10525734025 + 476286976 = 102595^2 + 21824^2 .

It is a cyclic number.

It is not a de Polignac number, because 11002021001 - 2³⁰ = 9928279177 is a prime.

It is a super-2 number, since 2×11002021001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11002021001.

It is not an unprimeable number, because it can be changed into a prime (11002021007) 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, 54465350 + ... + 54465551.

It is an arithmetic number, because the mean of its divisors is an integer number (2777738001).

Almost surely, 2^11002021001 is an apocalyptic number.

It is an amenable number.

11002021001 is a deficient number, since it is larger than the sum of its proper divisors (108931003).

11002021001 is a wasteful number, since it uses less digits than its factorization.

11002021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108931002.

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

Adding to 11002021001 its reverse (10012020011), we get a palindrome (21014041012).

The spelling of 11002021001 in words is "eleven billion, two million, twenty-one thousand, one".