21211223339 has 2 divisors, whose sum is σ = 21211223340. Its totient is φ = 21211223338.

The previous prime is 21211223317. The next prime is 21211223377. The reversal of 21211223339 is 93332211212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211223339 is a prime.

It is not a weakly prime, because it can be changed into another prime (21211223639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605611669 + 10605611670.

It is an arithmetic number, because the mean of its divisors is an integer number (10605611670).

Almost surely, 2^21211223339 is an apocalyptic number.

21211223339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211223339 is an equidigital number, since it uses as much as digits as its factorization.

21211223339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

The spelling of 21211223339 in words is "twenty-one billion, two hundred eleven million, two hundred twenty-three thousand, three hundred thirty-nine".