1233122221 has 16 divisors (see below), whose sum is σ = 1291417344. Its totient is φ = 1176462144.

The previous prime is 1233122213. The next prime is 1233122227. The reversal of 1233122221 is 1222213321.

It is a cyclic number.

It is not a de Polignac number, because 1233122221 - 2³ = 1233122213 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 (1233122227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404515 + ... + 407551.

It is an arithmetic number, because the mean of its divisors is an integer number (80713584).

Almost surely, 2^1233122221 is an apocalyptic number.

It is an amenable number.

1233122221 is a deficient number, since it is larger than the sum of its proper divisors (58295123).

1233122221 is a wasteful number, since it uses less digits than its factorization.

1233122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300.

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

The square root of 1233122221 is about 35115.8400298213. The cubic root of 1233122221 is about 1072.3470826657.

Adding to 1233122221 its reverse (1222213321), we get a palindrome (2455335542).

The spelling of 1233122221 in words is "one billion, two hundred thirty-three million, one hundred twenty-two thousand, two hundred twenty-one".