1232221213 has 4 divisors (see below), whose sum is σ = 1233458140. Its totient is φ = 1230984288.

The previous prime is 1232221181. The next prime is 1232221219. The reversal of 1232221213 is 3121222321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 707719609 + 524501604 = 26603^2 + 22902^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232221213 - 2⁵ = 1232221181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232221219) 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, 616968 + ... + 618961.

It is an arithmetic number, because the mean of its divisors is an integer number (308364535).

Almost surely, 2^1232221213 is an apocalyptic number.

It is an amenable number.

1232221213 is a deficient number, since it is larger than the sum of its proper divisors (1236927).

1232221213 is an equidigital number, since it uses as much as digits as its factorization.

1232221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236926.

The product of its digits is 288, while the sum is 19.

The square root of 1232221213 is about 35103.0086032522. The cubic root of 1232221213 is about 1072.0858409972.

Adding to 1232221213 its reverse (3121222321), we get a palindrome (4353443534).

The spelling of 1232221213 in words is "one billion, two hundred thirty-two million, two hundred twenty-one thousand, two hundred thirteen".