1223434221 has 4 divisors (see below), whose sum is σ = 1631245632. Its totient is φ = 815622812.

The previous prime is 1223434213. The next prime is 1223434241. The reversal of 1223434221 is 1224343221.

It is a happy number.

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 1223434221 - 2³ = 1223434213 is a prime.

It is a super-2 number, since 2×1223434221² = 2993582586227753682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1223434191 and 1223434200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223434241) 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, 203905701 + ... + 203905706.

It is an arithmetic number, because the mean of its divisors is an integer number (407811408).

Almost surely, 2^1223434221 is an apocalyptic number.

It is an amenable number.

1223434221 is a deficient number, since it is larger than the sum of its proper divisors (407811411).

1223434221 is an equidigital number, since it uses as much as digits as its factorization.

1223434221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407811410.

The product of its digits is 2304, while the sum is 24.

The square root of 1223434221 is about 34977.6245762916. The cubic root of 1223434221 is about 1069.5314048524.

Adding to 1223434221 its reverse (1224343221), we get a palindrome (2447777442).

It can be divided in two parts, 122 and 3434221, that added together give a palindrome (3434343).

The spelling of 1223434221 in words is "one billion, two hundred twenty-three million, four hundred thirty-four thousand, two hundred twenty-one".