21302100231911 has 2 divisors, whose sum is σ = 21302100231912. Its totient is φ = 21302100231910.

The previous prime is 21302100231833. The next prime is 21302100232067. The reversal of 21302100231911 is 11913200120312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21302100231911 - 2¹⁴ = 21302100215527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302100234911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651050115955 + 10651050115956.

It is an arithmetic number, because the mean of its divisors is an integer number (10651050115956).

Almost surely, 2^{21302100231911} is an apocalyptic number.

21302100231911 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302100231911 is an equidigital number, since it uses as much as digits as its factorization.

21302100231911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 21302100231911 in words is "twenty-one trillion, three hundred two billion, one hundred million, two hundred thirty-one thousand, nine hundred eleven".