21755502311 has 2 divisors, whose sum is σ = 21755502312. Its totient is φ = 21755502310.

The previous prime is 21755502281. The next prime is 21755502317. The reversal of 21755502311 is 11320555712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21755502311 - 2⁶ = 21755502247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21755502317) 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, 10877751155 + 10877751156.

It is an arithmetic number, because the mean of its divisors is an integer number (10877751156).

Almost surely, 2^21755502311 is an apocalyptic number.

21755502311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21755502311 is an equidigital number, since it uses as much as digits as its factorization.

21755502311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10500, while the sum is 32.

The spelling of 21755502311 in words is "twenty-one billion, seven hundred fifty-five million, five hundred two thousand, three hundred eleven".