21342310133 has 4 divisors (see below), whose sum is σ = 21350196960. Its totient is φ = 21334423308.

The previous prime is 21342310111. The next prime is 21342310147. The reversal of 21342310133 is 33101324312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21342310133 - 2⁶ = 21342310069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21342310099 and 21342310108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342310183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3939353 + ... + 3944766.

It is an arithmetic number, because the mean of its divisors is an integer number (5337549240).

Almost surely, 2^21342310133 is an apocalyptic number.

It is an amenable number.

21342310133 is a deficient number, since it is larger than the sum of its proper divisors (7886827).

21342310133 is an equidigital number, since it uses as much as digits as its factorization.

21342310133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7886826.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21342310133 its reverse (33101324312), we get a palindrome (54443634445).

The spelling of 21342310133 in words is "twenty-one billion, three hundred forty-two million, three hundred ten thousand, one hundred thirty-three".