102110021111 has 4 divisors (see below), whose sum is σ = 116697166992. Its totient is φ = 87522875232.

The previous prime is 102110021099. The next prime is 102110021113. The reversal of 102110021111 is 111120011201.

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 102110021111 - 2¹⁴ = 102110004727 is a prime.

It is a super-2 number, since 2×102110021111² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102110021092 and 102110021101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102110021113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7293572930 + ... + 7293572943.

It is an arithmetic number, because the mean of its divisors is an integer number (29174291748).

Almost surely, 2^102110021111 is an apocalyptic number.

102110021111 is a deficient number, since it is larger than the sum of its proper divisors (14587145881).

102110021111 is an equidigital number, since it uses as much as digits as its factorization.

102110021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14587145880.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 102110021111 its reverse (111120011201), we get a palindrome (213230032312).

The spelling of 102110021111 in words is "one hundred two billion, one hundred ten million, twenty-one thousand, one hundred eleven".