21163316350145 has 16 divisors (see below), whose sum is σ = 25749606093120. Its totient is φ = 16696237800000.

The previous prime is 21163316350123. The next prime is 21163316350147. The reversal of 21163316350145 is 54105361336112.

It is not a de Polignac number, because 21163316350145 - 2²² = 21163312155841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21163316350147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83354435 + ... + 83607944.

It is an arithmetic number, because the mean of its divisors is an integer number (1609350380820).

Almost surely, 2^{21163316350145} is an apocalyptic number.

It is an amenable number.

21163316350145 is a deficient number, since it is larger than the sum of its proper divisors (4586289742975).

21163316350145 is a wasteful number, since it uses less digits than its factorization.

21163316350145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166962736.

The product of its (nonzero) digits is 194400, while the sum is 41.

Adding to 21163316350145 its reverse (54105361336112), we get a palindrome (75268677686257).

The spelling of 21163316350145 in words is "twenty-one trillion, one hundred sixty-three billion, three hundred sixteen million, three hundred fifty thousand, one hundred forty-five".