1220031223 has 4 divisors (see below), whose sum is σ = 1231224280. Its totient is φ = 1208838168.

The previous prime is 1220031209. The next prime is 1220031259. The reversal of 1220031223 is 3221300221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3221300221 = 22259 ⋅144719.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220031223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220031197 and 1220031206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220031283) 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, 5596365 + ... + 5596582.

It is an arithmetic number, because the mean of its divisors is an integer number (307806070).

Almost surely, 2^1220031223 is an apocalyptic number.

1220031223 is a deficient number, since it is larger than the sum of its proper divisors (11193057).

1220031223 is a wasteful number, since it uses less digits than its factorization.

1220031223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11193056.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1220031223 is about 34928.9453462311. The cubic root of 1220031223 is about 1068.5388455639.

Adding to 1220031223 its reverse (3221300221), we get a palindrome (4441331444).

The spelling of 1220031223 in words is "one billion, two hundred twenty million, thirty-one thousand, two hundred twenty-three".