1223100321 has 4 divisors (see below), whose sum is σ = 1630800432. Its totient is φ = 815400212.

The previous prime is 1223100313. The next prime is 1223100341. The reversal of 1223100321 is 1230013221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1223100321 - 2³ = 1223100313 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223100321.

It is not an unprimeable number, because it can be changed into a prime (1223100341) 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, 203850051 + ... + 203850056.

It is an arithmetic number, because the mean of its divisors is an integer number (407700108).

Almost surely, 2^1223100321 is an apocalyptic number.

It is an amenable number.

1223100321 is a deficient number, since it is larger than the sum of its proper divisors (407700111).

1223100321 is an equidigital number, since it uses as much as digits as its factorization.

1223100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407700110.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1223100321 is about 34972.8511991802. The cubic root of 1223100321 is about 1069.4340970656.

Adding to 1223100321 its reverse (1230013221), we get a palindrome (2453113542).

The spelling of 1223100321 in words is "one billion, two hundred twenty-three million, one hundred thousand, three hundred twenty-one".