102021223 has 4 divisors (see below), whose sum is σ = 103418848. Its totient is φ = 100623600.

The previous prime is 102021197. The next prime is 102021251. The reversal of 102021223 is 322120201.

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 102021223 - 2¹³ = 102013031 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 (102021253) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 698703 + ... + 698848.

It is an arithmetic number, because the mean of its divisors is an integer number (25854712).

Almost surely, 2^102021223 is an apocalyptic number.

102021223 is a deficient number, since it is larger than the sum of its proper divisors (1397625).

102021223 is an equidigital number, since it uses as much as digits as its factorization.

102021223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397624.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 102021223 is about 10100.5555787788. Note that the first 4 decimals coincide. The cubic root of 102021223 is about 467.2652760891.

Adding to 102021223 its reverse (322120201), we get a palindrome (424141424).

The spelling of 102021223 in words is "one hundred two million, twenty-one thousand, two hundred twenty-three".