21055131059 has 2 divisors, whose sum is σ = 21055131060. Its totient is φ = 21055131058.

The previous prime is 21055130983. The next prime is 21055131101. The reversal of 21055131059 is 95013155012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21055131059 - 2¹⁶ = 21055065523 is a prime.

It is a super-2 number, since 2×21055131059² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21055131359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10527565529 + 10527565530.

It is an arithmetic number, because the mean of its divisors is an integer number (10527565530).

Almost surely, 2^21055131059 is an apocalyptic number.

21055131059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21055131059 is an equidigital number, since it uses as much as digits as its factorization.

21055131059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6750, while the sum is 32.

The spelling of 21055131059 in words is "twenty-one billion, fifty-five million, one hundred thirty-one thousand, fifty-nine".