102123106 has 4 divisors (see below), whose sum is σ = 153184662. Its totient is φ = 51061552.

The previous prime is 102123101. The next prime is 102123107. The reversal of 102123106 is 601321201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601321201 = 13 ⋅46255477.

It can be written as a sum of positive squares in only one way, i.e., 99900025 + 2223081 = 9995^2 + 1491^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 102123106.

It is not an unprimeable number, because it can be changed into a prime (102123101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25530775 + ... + 25530778.

Almost surely, 2^102123106 is an apocalyptic number.

102123106 is a deficient number, since it is larger than the sum of its proper divisors (51061556).

102123106 is an equidigital number, since it uses as much as digits as its factorization.

102123106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51061555.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 102123106 is about 10105.5977556996. The cubic root of 102123106 is about 467.4207684080.

Adding to 102123106 its reverse (601321201), we get a palindrome (703444307).

The spelling of 102123106 in words is "one hundred two million, one hundred twenty-three thousand, one hundred six".