21432030312233 has 2 divisors, whose sum is σ = 21432030312234. Its totient is φ = 21432030312232.

The previous prime is 21432030312229. The next prime is 21432030312269. The reversal of 21432030312233 is 33221303023412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17765525316889 + 3666504995344 = 4214917^2 + 1914812^2 .

It is a cyclic number.

It is not a de Polignac number, because 21432030312233 - 2² = 21432030312229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21432030312196 and 21432030312205.

It is not a weakly prime, because it can be changed into another prime (21432030318233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716015156116 + 10716015156117.

It is an arithmetic number, because the mean of its divisors is an integer number (10716015156117).

Almost surely, 2^{21432030312233} is an apocalyptic number.

It is an amenable number.

21432030312233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432030312233 is an equidigital number, since it uses as much as digits as its factorization.

21432030312233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 21432030312233 its reverse (33221303023412), we get a palindrome (54653333335645).

The spelling of 21432030312233 in words is "twenty-one trillion, four hundred thirty-two billion, thirty million, three hundred twelve thousand, two hundred thirty-three".