111101002001 has 4 divisors (see below), whose sum is σ = 121201093104. Its totient is φ = 101000910900.

The previous prime is 111101001929. The next prime is 111101002057. The reversal of 111101002001 is 100200101111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100200101111 = 11 ⋅9109100101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111101002001 is a prime.

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 111101002001.

It is not an unprimeable number, because it can be changed into a prime (111101002081) 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, 5050045535 + ... + 5050045556.

It is an arithmetic number, because the mean of its divisors is an integer number (30300273276).

Almost surely, 2^111101002001 is an apocalyptic number.

111101002001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111101002001 is a deficient number, since it is larger than the sum of its proper divisors (10100091103).

111101002001 is a wasteful number, since it uses less digits than its factorization.

111101002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100091102.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 111101002001 its reverse (100200101111), we get a palindrome (211301103112).

The spelling of 111101002001 in words is "one hundred eleven billion, one hundred one million, two thousand, one".