33421312321 has 2 divisors, whose sum is σ = 33421312322. Its totient is φ = 33421312320.

The previous prime is 33421312283. The next prime is 33421312399. The reversal of 33421312321 is 12321312433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26380256400 + 7041055921 = 162420^2 + 83911^2 .

It is a cyclic number.

It is not a de Polignac number, because 33421312321 - 2¹⁷ = 33421181249 is a prime.

It is a super-2 number, since 2×33421312321² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33421012321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16710656160 + 16710656161.

It is an arithmetic number, because the mean of its divisors is an integer number (16710656161).

Almost surely, 2^33421312321 is an apocalyptic number.

It is an amenable number.

33421312321 is a deficient number, since it is larger than the sum of its proper divisors (1).

33421312321 is an equidigital number, since it uses as much as digits as its factorization.

33421312321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

Adding to 33421312321 its reverse (12321312433), we get a palindrome (45742624754).

The spelling of 33421312321 in words is "thirty-three billion, four hundred twenty-one million, three hundred twelve thousand, three hundred twenty-one".