102125111 has 12 divisors (see below), whose sum is σ = 112473672. Its totient is φ = 91962000.

The previous prime is 102125099. The next prime is 102125119. The reversal of 102125111 is 111521201.

It is not a de Polignac number, because 102125111 - 2¹⁸ = 101862967 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 (102125119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188501 + ... + 189041.

It is an arithmetic number, because the mean of its divisors is an integer number (9372806).

Almost surely, 2^102125111 is an apocalyptic number.

102125111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102125111 is a deficient number, since it is larger than the sum of its proper divisors (10348561).

102125111 is an equidigital number, since it uses as much as digits as its factorization.

102125111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 14.

The square root of 102125111 is about 10105.6969576571. The cubic root of 102125111 is about 467.4238273713.

Adding to 102125111 its reverse (111521201), we get a palindrome (213646312).

The spelling of 102125111 in words is "one hundred two million, one hundred twenty-five thousand, one hundred eleven".