233121001 has 2 divisors, whose sum is σ = 233121002. Its totient is φ = 233121000.

The previous prime is 233120999. The next prime is 233121011. The reversal of 233121001 is 100121332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198133776 + 34987225 = 14076^2 + 5915^2 .

It is a cyclic number.

It is not a de Polignac number, because 233121001 - 2¹ = 233120999 is a prime.

It is a super-2 number, since 2×233121001² = 108690802214484002, which contains 22 as substring.

Together with 233120999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (233121011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116560500 + 116560501.

It is an arithmetic number, because the mean of its divisors is an integer number (116560501).

Almost surely, 2^233121001 is an apocalyptic number.

It is an amenable number.

233121001 is a deficient number, since it is larger than the sum of its proper divisors (1).

233121001 is an equidigital number, since it uses as much as digits as its factorization.

233121001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 233121001 is about 15268.3005275636. The cubic root of 233121001 is about 615.4514507525.

Adding to 233121001 its reverse (100121332), we get a palindrome (333242333).

It can be divided in two parts, 2331 and 21001, that added together give a palindrome (23332).

The spelling of 233121001 in words is "two hundred thirty-three million, one hundred twenty-one thousand, one".