1233222021 has 24 divisors (see below), whose sum is σ = 1800314880. Its totient is φ = 813429216.

The previous prime is 1233222017. The next prime is 1233222043. The reversal of 1233222021 is 1202223321.

It is not a de Polignac number, because 1233222021 - 2² = 1233222017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1233221985 and 1233222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233222061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 342396 + ... + 345978.

It is an arithmetic number, because the mean of its divisors is an integer number (75013120).

Almost surely, 2^1233222021 is an apocalyptic number.

It is an amenable number.

1233222021 is a deficient number, since it is larger than the sum of its proper divisors (567092859).

1233222021 is a wasteful number, since it uses less digits than its factorization.

1233222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985 (or 3982 counting only the distinct ones).

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

The square root of 1233222021 is about 35117.2610122145. The cubic root of 1233222021 is about 1072.3760112261.

Adding to 1233222021 its reverse (1202223321), we get a palindrome (2435445342).

The spelling of 1233222021 in words is "one billion, two hundred thirty-three million, two hundred twenty-two thousand, twenty-one".