1233022221 has 6 divisors (see below), whose sum is σ = 1781032110. Its totient is φ = 822014808.

The previous prime is 1233022207. The next prime is 1233022243. The reversal of 1233022221 is 1222203321.

It can be written as a sum of positive squares in only one way, i.e., 893172996 + 339849225 = 29886^2 + 18435^2 .

It is not a de Polignac number, because 1233022221 - 2⁹ = 1233021709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1233022194 and 1233022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233022201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68501226 + ... + 68501243.

It is an arithmetic number, because the mean of its divisors is an integer number (296838685).

Almost surely, 2^1233022221 is an apocalyptic number.

It is an amenable number.

1233022221 is a deficient number, since it is larger than the sum of its proper divisors (548009889).

1233022221 is a wasteful number, since it uses less digits than its factorization.

1233022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137002475 (or 137002472 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1233022221 is about 35114.4161420918. The cubic root of 1233022221 is about 1072.3180945667.

Adding to 1233022221 its reverse (1222203321), we get a palindrome (2455225542).

The spelling of 1233022221 in words is "one billion, two hundred thirty-three million, twenty-two thousand, two hundred twenty-one".