21235130339 has 2 divisors, whose sum is σ = 21235130340. Its totient is φ = 21235130338.

The previous prime is 21235130333. The next prime is 21235130347. The reversal of 21235130339 is 93303153212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21235130339 is a prime.

It is not a weakly prime, because it can be changed into another prime (21235130333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617565169 + 10617565170.

It is an arithmetic number, because the mean of its divisors is an integer number (10617565170).

Almost surely, 2^21235130339 is an apocalyptic number.

21235130339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21235130339 is an equidigital number, since it uses as much as digits as its factorization.

21235130339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 32.

The spelling of 21235130339 in words is "twenty-one billion, two hundred thirty-five million, one hundred thirty thousand, three hundred thirty-nine".