11111002001001 has 48 divisors (see below), whose sum is σ = 18382916957184. Its totient is φ = 6334986343392.

The previous prime is 11111002000963. The next prime is 11111002001041. The reversal of 11111002001001 is 10010020011111.

It is not a de Polignac number, because 11111002001001 - 2¹⁴ = 11111001984617 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 (11111002001041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51106810 + ... + 51323756.

It is an arithmetic number, because the mean of its divisors is an integer number (382977436608).

Almost surely, 2^{11111002001001} is an apocalyptic number.

It is an amenable number.

11111002001001 is a deficient number, since it is larger than the sum of its proper divisors (7271914956183).

11111002001001 is a wasteful number, since it uses less digits than its factorization.

11111002001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218770 (or 218767 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11111002001001 its reverse (10010020011111), we get a palindrome (21121022012112).

The spelling of 11111002001001 in words is "eleven trillion, one hundred eleven billion, two million, one thousand, one".