1231223229 has 12 divisors (see below), whose sum is σ = 1796043132. Its totient is φ = 812688000.

The previous prime is 1231223179. The next prime is 1231223251. The reversal of 1231223229 is 9223221321.

It can be written as a sum of positive squares in 2 ways, for example, as 813960900 + 417262329 = 28530^2 + 20427^2 .

It is not a de Polignac number, because 1231223229 - 2¹¹ = 1231221181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231223029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 676332 + ... + 678149.

It is an arithmetic number, because the mean of its divisors is an integer number (149670261).

Almost surely, 2^1231223229 is an apocalyptic number.

It is an amenable number.

1231223229 is a deficient number, since it is larger than the sum of its proper divisors (564819903).

1231223229 is a wasteful number, since it uses less digits than its factorization.

1231223229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354588 (or 1354585 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1231223229 is about 35088.7906460169. The cubic root of 1231223229 is about 1071.7963330526.

The spelling of 1231223229 in words is "one billion, two hundred thirty-one million, two hundred twenty-three thousand, two hundred twenty-nine".