11111102001001 has 8 divisors (see below), whose sum is σ = 11881178379144. Its totient is φ = 10353968083200.

The previous prime is 11111102000963. The next prime is 11111102001007. The reversal of 11111102001001 is 10010020111111.

It can be written as a sum of positive squares in 4 ways, for example, as 2842596000000 + 8268506001001 = 1686000^2 + 2875501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11111102001001 - 2³⁵ = 11076742262633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11111102001007) 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, 3235613310 + ... + 3235616743.

It is an arithmetic number, because the mean of its divisors is an integer number (1485147297393).

Almost surely, 2^{11111102001001} is an apocalyptic number.

It is an amenable number.

11111102001001 is a deficient number, since it is larger than the sum of its proper divisors (770076378143).

11111102001001 is a wasteful number, since it uses less digits than its factorization.

11111102001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6471230171.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 11111102001001 its reverse (10010020111111), we get a palindrome (21121122112112).

The spelling of 11111102001001 in words is "eleven trillion, one hundred eleven billion, one hundred two million, one thousand, one".