21243233001 has 8 divisors (see below), whose sum is σ = 28858731840. Its totient is φ = 13894944752.

The previous prime is 21243232937. The next prime is 21243233017. The reversal of 21243233001 is 10033234212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21243233001 - 2⁶ = 21243232937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21243233041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66802461 + ... + 66802778.

It is an arithmetic number, because the mean of its divisors is an integer number (3607341480).

Almost surely, 2^21243233001 is an apocalyptic number.

It is an amenable number.

21243233001 is a deficient number, since it is larger than the sum of its proper divisors (7615498839).

21243233001 is a wasteful number, since it uses less digits than its factorization.

21243233001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133605295.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21243233001 its reverse (10033234212), we get a palindrome (31276467213).

The spelling of 21243233001 in words is "twenty-one billion, two hundred forty-three million, two hundred thirty-three thousand, one".