1233123213 has 32 divisors (see below), whose sum is σ = 1917907200. Its totient is φ = 690218496.

The previous prime is 1233123209. The next prime is 1233123217. The reversal of 1233123213 is 3123213321.

It is an interprime number because it is at equal distance from previous prime (1233123209) and next prime (1233123217).

It is not a de Polignac number, because 1233123213 - 2² = 1233123209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1233123213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233123217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200695 + ... + 206747.

It is an arithmetic number, because the mean of its divisors is an integer number (59934600).

Almost surely, 2^1233123213 is an apocalyptic number.

It is an amenable number.

1233123213 is a deficient number, since it is larger than the sum of its proper divisors (684783987).

1233123213 is a wasteful number, since it uses less digits than its factorization.

1233123213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6261.

The product of its digits is 648, while the sum is 21.

The square root of 1233123213 is about 35115.8541544984. The cubic root of 1233123213 is about 1072.3473702198.

Adding to 1233123213 its reverse (3123213321), we get a palindrome (4356336534).

The spelling of 1233123213 in words is "one billion, two hundred thirty-three million, one hundred twenty-three thousand, two hundred thirteen".