11111120002001 has 16 divisors (see below), whose sum is σ = 12076543618560. Its totient is φ = 10183947056640.

The previous prime is 11111120001973. The next prime is 11111120002013. The reversal of 11111120002001 is 10020002111111.

It is a cyclic number.

It is not a de Polignac number, because 11111120002001 - 2¹⁰ = 11111120000977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111120002061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477326 + ... + 4738151.

It is an arithmetic number, because the mean of its divisors is an integer number (754783976160).

Almost surely, 2^{11111120002001} is an apocalyptic number.

It is an amenable number.

11111120002001 is a deficient number, since it is larger than the sum of its proper divisors (965423616559).

11111120002001 is a wasteful number, since it uses less digits than its factorization.

11111120002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5219144.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11111120002001 its reverse (10020002111111), we get a palindrome (21131122113112).

The spelling of 11111120002001 in words is "eleven trillion, one hundred eleven billion, one hundred twenty million, two thousand, one".