111101201001 has 96 divisors (see below), whose sum is σ = 189487584000. Its totient is φ = 62697922560.

The previous prime is 111101200961. The next prime is 111101201047. The reversal of 111101201001 is 100102101111.

It is not a de Polignac number, because 111101201001 - 2¹⁰ = 111101199977 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 (111101205001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 103929495 + ... + 103930563.

It is an arithmetic number, because the mean of its divisors is an integer number (1973829000).

Almost surely, 2^111101201001 is an apocalyptic number.

It is an amenable number.

111101201001 is a deficient number, since it is larger than the sum of its proper divisors (78386382999).

111101201001 is a wasteful number, since it uses less digits than its factorization.

111101201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484 (or 1467 counting only the distinct ones).

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

Adding to 111101201001 its reverse (100102101111), we get a palindrome (211203302112).

The spelling of 111101201001 in words is "one hundred eleven billion, one hundred one million, two hundred one thousand, one".