21653052353071 has 2 divisors, whose sum is σ = 21653052353072. Its totient is φ = 21653052353070.

The previous prime is 21653052353003. The next prime is 21653052353077. The reversal of 21653052353071 is 17035325035612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21653052353071 - 2¹¹ = 21653052351023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21653052353077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10826526176535 + 10826526176536.

It is an arithmetic number, because the mean of its divisors is an integer number (10826526176536).

Almost surely, 2^{21653052353071} is an apocalyptic number.

21653052353071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21653052353071 is an equidigital number, since it uses as much as digits as its factorization.

21653052353071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567000, while the sum is 43.

Adding to 21653052353071 its reverse (17035325035612), we get a palindrome (38688377388683).

The spelling of 21653052353071 in words is "twenty-one trillion, six hundred fifty-three billion, fifty-two million, three hundred fifty-three thousand, seventy-one".