1233423340221 has 16 divisors (see below), whose sum is σ = 1648488526848. Its totient is φ = 820320442800.

The previous prime is 1233423340217. The next prime is 1233423340229. The reversal of 1233423340221 is 1220433243321.

It is a happy number.

It is not a de Polignac number, because 1233423340221 - 2² = 1233423340217 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233423340229) 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, 33510390 + ... + 33547176.

It is an arithmetic number, because the mean of its divisors is an integer number (103030532928).

Almost surely, 2^{1233423340221} is an apocalyptic number.

It is an amenable number.

1233423340221 is a deficient number, since it is larger than the sum of its proper divisors (415065186627).

1233423340221 is a wasteful number, since it uses less digits than its factorization.

1233423340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63152.

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 1233423340221 its reverse (1220433243321), we get a palindrome (2453856583542).

The spelling of 1233423340221 in words is "one trillion, two hundred thirty-three billion, four hundred twenty-three million, three hundred forty thousand, two hundred twenty-one".