21116150664503 has 2 divisors, whose sum is σ = 21116150664504. Its totient is φ = 21116150664502.

The previous prime is 21116150664491. The next prime is 21116150664541. The reversal of 21116150664503 is 30546605161112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21116150664503 - 2¹⁰ = 21116150663479 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21116150664563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10558075332251 + 10558075332252.

It is an arithmetic number, because the mean of its divisors is an integer number (10558075332252).

Almost surely, 2^{21116150664503} is an apocalyptic number.

21116150664503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21116150664503 is an equidigital number, since it uses as much as digits as its factorization.

21116150664503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 21116150664503 in words is "twenty-one trillion, one hundred sixteen billion, one hundred fifty million, six hundred sixty-four thousand, five hundred three".