1000121223 has 4 divisors (see below), whose sum is σ = 1333494968. Its totient is φ = 666747480.

The previous prime is 1000121197. The next prime is 1000121257. The reversal of 1000121223 is 3221210001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1000121223 - 2⁸ = 1000120967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000121199 and 1000121208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000121623) 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, 166686868 + ... + 166686873.

It is an arithmetic number, because the mean of its divisors is an integer number (333373742).

Almost surely, 2^1000121223 is an apocalyptic number.

1000121223 is a deficient number, since it is larger than the sum of its proper divisors (333373745).

1000121223 is an equidigital number, since it uses as much as digits as its factorization.

1000121223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333373744.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1000121223 is about 31624.6932475242. The cubic root of 1000121223 is about 1000.0404060340.

Adding to 1000121223 its reverse (3221210001), we get a palindrome (4221331224).

The spelling of 1000121223 in words is "one billion, one hundred twenty-one thousand, two hundred twenty-three".