102121423 has 4 divisors (see below), whose sum is σ = 102143160. Its totient is φ = 102099688.

The previous prime is 102121421. The next prime is 102121463. The reversal of 102121423 is 324121201.

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 102121423 - 2¹ = 102121421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102121397 and 102121406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565 + ... + 14302.

It is an arithmetic number, because the mean of its divisors is an integer number (25535790).

Almost surely, 2^102121423 is an apocalyptic number.

102121423 is a deficient number, since it is larger than the sum of its proper divisors (21737).

102121423 is an equidigital number, since it uses as much as digits as its factorization.

102121423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21736.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 102121423 is about 10105.5144846762. The cubic root of 102121423 is about 467.4182006787.

Adding to 102121423 its reverse (324121201), we get a palindrome (426242624).

The spelling of 102121423 in words is "one hundred two million, one hundred twenty-one thousand, four hundred twenty-three".