21188650141 has 2 divisors, whose sum is σ = 21188650142. Its totient is φ = 21188650140.

The previous prime is 21188650097. The next prime is 21188650199. The reversal of 21188650141 is 14105688112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21040662916 + 147987225 = 145054^2 + 12165^2 .

It is a cyclic number.

It is not a de Polignac number, because 21188650141 - 2³¹ = 19041166493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21188650141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21188657141) 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, 10594325070 + 10594325071.

It is an arithmetic number, because the mean of its divisors is an integer number (10594325071).

Almost surely, 2^21188650141 is an apocalyptic number.

It is an amenable number.

21188650141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21188650141 is an equidigital number, since it uses as much as digits as its factorization.

21188650141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 37.

The spelling of 21188650141 in words is "twenty-one billion, one hundred eighty-eight million, six hundred fifty thousand, one hundred forty-one".