21303223330234 has 4 divisors (see below), whose sum is σ = 31954834995354. Its totient is φ = 10651611665116.

The previous prime is 21303223330223. The next prime is 21303223330237. The reversal of 21303223330234 is 43203332230312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20477027774025 + 826195556209 = 4525155^2 + 908953^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21303223330196 and 21303223330205.

It is not an unprimeable number, because it can be changed into a prime (21303223330237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5325805832557 + ... + 5325805832560.

Almost surely, 2^{21303223330234} is an apocalyptic number.

21303223330234 is a deficient number, since it is larger than the sum of its proper divisors (10651611665120).

21303223330234 is a wasteful number, since it uses less digits than its factorization.

21303223330234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10651611665119.

The product of its (nonzero) digits is 46656, while the sum is 31.

Adding to 21303223330234 its reverse (43203332230312), we get a palindrome (64506555560546).

The spelling of 21303223330234 in words is "twenty-one trillion, three hundred three billion, two hundred twenty-three million, three hundred thirty thousand, two hundred thirty-four".