1000223121 has 16 divisors (see below), whose sum is σ = 1372428288. Its totient is φ = 647634000.

The previous prime is 1000223089. The next prime is 1000223141. The reversal of 1000223121 is 1213220001.

It is not a de Polignac number, because 1000223121 - 2⁵ = 1000223089 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1000223097 and 1000223106.

It is not an unprimeable number, because it can be changed into a prime (1000223141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8605 + ... + 45546.

It is an arithmetic number, because the mean of its divisors is an integer number (85776768).

Almost surely, 2^1000223121 is an apocalyptic number.

It is an amenable number.

1000223121 is a deficient number, since it is larger than the sum of its proper divisors (372205167).

1000223121 is a wasteful number, since it uses less digits than its factorization.

1000223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54332.

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

The square root of 1000223121 is about 31626.3042576903. The cubic root of 1000223121 is about 1000.0743681359.

Adding to 1000223121 its reverse (1213220001), we get a palindrome (2213443122).

The spelling of 1000223121 in words is "one billion, two hundred twenty-three thousand, one hundred twenty-one".