21233033147 has 2 divisors, whose sum is σ = 21233033148. Its totient is φ = 21233033146.

The previous prime is 21233033131. The next prime is 21233033287. The reversal of 21233033147 is 74133033212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21233033147 - 2⁴ = 21233033131 is a prime.

It is not a weakly prime, because it can be changed into another prime (21233033747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616516573 + 10616516574.

It is an arithmetic number, because the mean of its divisors is an integer number (10616516574).

Almost surely, 2^21233033147 is an apocalyptic number.

21233033147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233033147 is an equidigital number, since it uses as much as digits as its factorization.

21233033147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 29.

Adding to 21233033147 its reverse (74133033212), we get a palindrome (95366066359).

The spelling of 21233033147 in words is "twenty-one billion, two hundred thirty-three million, thirty-three thousand, one hundred forty-seven".