102421105 has 8 divisors (see below), whose sum is σ = 122984064. Its totient is φ = 81884400.

The previous prime is 102421079. The next prime is 102421133. The reversal of 102421105 is 501124201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102421105 - 2²⁵ = 68866673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3400 + ... + 14710.

It is an arithmetic number, because the mean of its divisors is an integer number (15373008).

Almost surely, 2^102421105 is an apocalyptic number.

It is an amenable number.

102421105 is a deficient number, since it is larger than the sum of its proper divisors (20562959).

102421105 is a wasteful number, since it uses less digits than its factorization.

102421105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13127.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 102421105 is about 10120.3312692817. The cubic root of 102421105 is about 467.8749772574.

Adding to 102421105 its reverse (501124201), we get a palindrome (603545306).

The spelling of 102421105 in words is "one hundred two million, four hundred twenty-one thousand, one hundred five".