8221123 has 4 divisors (see below), whose sum is σ = 8504640. Its totient is φ = 7937608.

The previous prime is 8221111. The next prime is 8221139. The reversal of 8221123 is 3211228.

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 8221123 - 2¹³ = 8212931 is a prime.

It is a super-2 number, since 2×8221123² = 135173726762258, which contains 22 as substring.

It is a Duffinian number.

8221123 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8221123.

It is not an unprimeable number, because it can be changed into a prime (8221223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141715 + ... + 141772.

It is an arithmetic number, because the mean of its divisors is an integer number (2126160).

Almost surely, 2^8221123 is an apocalyptic number.

8221123 is a deficient number, since it is larger than the sum of its proper divisors (283517).

8221123 is a wasteful number, since it uses less digits than its factorization.

8221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283516.

The product of its digits is 192, while the sum is 19.

The square root of 8221123 is about 2867.2500762926. The cubic root of 8221123 is about 201.8259700986.

The spelling of 8221123 in words is "eight million, two hundred twenty-one thousand, one hundred twenty-three".