102001111111 has 4 divisors (see below), whose sum is σ = 102002037552. Its totient is φ = 102000184672.

The previous prime is 102001111099. The next prime is 102001111153. The reversal of 102001111111 is 111111100201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 111111100201 = 10337 ⋅10748873.

It is a cyclic number.

It is not a de Polignac number, because 102001111111 - 2⁹ = 102001110599 is a prime.

It is a Duffinian number.

102001111111 is a modest number, since divided by 111111 gives 102001 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102001111181) 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, 271666 + ... + 527071.

It is an arithmetic number, because the mean of its divisors is an integer number (25500509388).

Almost surely, 2^102001111111 is an apocalyptic number.

102001111111 is a deficient number, since it is larger than the sum of its proper divisors (926441).

102001111111 is an equidigital number, since it uses as much as digits as its factorization.

102001111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926440.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 102001111111 its reverse (111111100201), we get a palindrome (213112211312).

The spelling of 102001111111 in words is "one hundred two billion, one million, one hundred eleven thousand, one hundred eleven".