111210011001 has 24 divisors (see below), whose sum is σ = 174682824264. Its totient is φ = 67892912640.

The previous prime is 111210010997. The next prime is 111210011083. The reversal of 111210011001 is 100110012111.

It can be written as a sum of positive squares in 4 ways, for example, as 90300851001 + 20909160000 = 300501^2 + 144600^2 .

It is not a de Polignac number, because 111210011001 - 2² = 111210010997 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 (111210011201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9816810 + ... + 9828131.

It is an arithmetic number, because the mean of its divisors is an integer number (7278451011).

Almost surely, 2^111210011001 is an apocalyptic number.

It is an amenable number.

111210011001 is a deficient number, since it is larger than the sum of its proper divisors (63472813263).

111210011001 is a wasteful number, since it uses less digits than its factorization.

111210011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19645001 (or 19644998 counting only the distinct ones).

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

Adding to 111210011001 its reverse (100110012111), we get a palindrome (211320023112).

The spelling of 111210011001 in words is "one hundred eleven billion, two hundred ten million, eleven thousand, one".