21535250141 has 2 divisors, whose sum is σ = 21535250142. Its totient is φ = 21535250140.

The previous prime is 21535250029. The next prime is 21535250147. The reversal of 21535250141 is 14105253512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16121380900 + 5413869241 = 126970^2 + 73579^2 .

It is a cyclic number.

It is not a de Polignac number, because 21535250141 - 2³⁰ = 20461508317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21535250147) 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, 10767625070 + 10767625071.

It is an arithmetic number, because the mean of its divisors is an integer number (10767625071).

Almost surely, 2^21535250141 is an apocalyptic number.

It is an amenable number.

21535250141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21535250141 is an equidigital number, since it uses as much as digits as its factorization.

21535250141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 21535250141 in words is "twenty-one billion, five hundred thirty-five million, two hundred fifty thousand, one hundred forty-one".