102102111020111 has 4 divisors (see below), whose sum is σ = 102102216919824. Its totient is φ = 102102005120400.

The previous prime is 102102111020069. The next prime is 102102111020123. The reversal of 102102111020111 is 111020111201201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102102111020111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102111020171) 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, 51490235 + ... + 53436396.

It is an arithmetic number, because the mean of its divisors is an integer number (25525554229956).

Almost surely, 2^{102102111020111} is an apocalyptic number.

102102111020111 is a deficient number, since it is larger than the sum of its proper divisors (105899713).

102102111020111 is an equidigital number, since it uses as much as digits as its factorization.

102102111020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105899712.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 102102111020111 its reverse (111020111201201), we get a palindrome (213122222221312).

The spelling of 102102111020111 in words is "one hundred two trillion, one hundred two billion, one hundred eleven million, twenty thousand, one hundred eleven".