21111230339 has 2 divisors, whose sum is σ = 21111230340. Its totient is φ = 21111230338.

The previous prime is 21111230291. The next prime is 21111230381. The reversal of 21111230339 is 93303211112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21111230339 is a prime.

It is not a weakly prime, because it can be changed into another prime (21111238339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555615169 + 10555615170.

It is an arithmetic number, because the mean of its divisors is an integer number (10555615170).

Almost surely, 2^21111230339 is an apocalyptic number.

21111230339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111230339 is an equidigital number, since it uses as much as digits as its factorization.

21111230339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 21111230339 in words is "twenty-one billion, one hundred eleven million, two hundred thirty thousand, three hundred thirty-nine".