111002102001 has 20 divisors (see below), whose sum is σ = 189506235072. Its totient is φ = 63429772248.

The previous prime is 111002101979. The next prime is 111002102047. The reversal of 111002102001 is 100201200111.

It is a happy number.

It is not a de Polignac number, because 111002102001 - 2²³ = 110993713393 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 (111002102401) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 97884885 + ... + 97886018.

Almost surely, 2^111002102001 is an apocalyptic number.

It is an amenable number.

111002102001 is a deficient number, since it is larger than the sum of its proper divisors (78504133071).

111002102001 is an equidigital number, since it uses as much as digits as its factorization.

111002102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195770922 (or 195770913 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111002102001 its reverse (100201200111), we get a palindrome (211203302112).

The spelling of 111002102001 in words is "one hundred eleven billion, two million, one hundred two thousand, one".