21100755959 has 2 divisors, whose sum is σ = 21100755960. Its totient is φ = 21100755958.

The previous prime is 21100755947. The next prime is 21100755971. The reversal of 21100755959 is 95955700112.

It is a balanced prime because it is at equal distance from previous prime (21100755947) and next prime (21100755971).

It is a cyclic number.

It is not a de Polignac number, because 21100755959 - 2⁴ = 21100755943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100754959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550377979 + 10550377980.

It is an arithmetic number, because the mean of its divisors is an integer number (10550377980).

Almost surely, 2^21100755959 is an apocalyptic number.

21100755959 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100755959 is an equidigital number, since it uses as much as digits as its factorization.

21100755959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141750, while the sum is 44.

The spelling of 21100755959 in words is "twenty-one billion, one hundred million, seven hundred fifty-five thousand, nine hundred fifty-nine".