21342033331 has 2 divisors, whose sum is σ = 21342033332. Its totient is φ = 21342033330.

The previous prime is 21342033329. The next prime is 21342033341. The reversal of 21342033331 is 13333024312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21342033331 - 2¹ = 21342033329 is a prime.

It is a super-3 number, since 3×21342033331³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 21342033329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21342033296 and 21342033305.

It is not a weakly prime, because it can be changed into another prime (21342033301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671016665 + 10671016666.

It is an arithmetic number, because the mean of its divisors is an integer number (10671016666).

Almost surely, 2^21342033331 is an apocalyptic number.

21342033331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21342033331 is an equidigital number, since it uses as much as digits as its factorization.

21342033331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21342033331 its reverse (13333024312), we get a palindrome (34675057643).

The spelling of 21342033331 in words is "twenty-one billion, three hundred forty-two million, thirty-three thousand, three hundred thirty-one".