102111100123 has 2 divisors, whose sum is σ = 102111100124. Its totient is φ = 102111100122.

The previous prime is 102111100111. The next prime is 102111100141. The reversal of 102111100123 is 321001111201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102111100123 - 2¹³ = 102111091931 is a prime.

It is not a weakly prime, because it can be changed into another prime (102111100103) 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 as a sum of consecutive naturals, namely, 51055550061 + 51055550062.

It is an arithmetic number, because the mean of its divisors is an integer number (51055550062).

Almost surely, 2^102111100123 is an apocalyptic number.

102111100123 is a deficient number, since it is larger than the sum of its proper divisors (1).

102111100123 is an equidigital number, since it uses as much as digits as its factorization.

102111100123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 102111100123 its reverse (321001111201), we get a palindrome (423112211324).

The spelling of 102111100123 in words is "one hundred two billion, one hundred eleven million, one hundred thousand, one hundred twenty-three".