102111122100111 has 4 divisors (see below), whose sum is σ = 136148162800152. Its totient is φ = 68074081400072.

The previous prime is 102111122100109. The next prime is 102111122100133. The reversal of 102111122100111 is 111001221111201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102111122100111 - 2¹ = 102111122100109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111122800111) 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, 17018520350016 + ... + 17018520350021.

It is an arithmetic number, because the mean of its divisors is an integer number (34037040700038).

Almost surely, 2^{102111122100111} is an apocalyptic number.

102111122100111 is a deficient number, since it is larger than the sum of its proper divisors (34037040700041).

102111122100111 is an equidigital number, since it uses as much as digits as its factorization.

102111122100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34037040700040.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 102111122100111 its reverse (111001221111201), we get a palindrome (213112343211312).

The spelling of 102111122100111 in words is "one hundred two trillion, one hundred eleven billion, one hundred twenty-two million, one hundred thousand, one hundred eleven".