21216363361105 has 16 divisors (see below), whose sum is σ = 27795205468800. Its totient is φ = 15418384072960.

The previous prime is 21216363361093. The next prime is 21216363361117. The reversal of 21216363361105 is 50116336361212.

It is an interprime number because it is at equal distance from previous prime (21216363361093) and next prime (21216363361117).

It is not a de Polignac number, because 21216363361105 - 2¹³ = 21216363352913 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146156440 + ... + 146301529.

It is an arithmetic number, because the mean of its divisors is an integer number (1737200341800).

Almost surely, 2^{21216363361105} is an apocalyptic number.

It is an amenable number.

21216363361105 is a deficient number, since it is larger than the sum of its proper divisors (6578842107695).

21216363361105 is a wasteful number, since it uses less digits than its factorization.

21216363361105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292459304.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 21216363361105 in words is "twenty-one trillion, two hundred sixteen billion, three hundred sixty-three million, three hundred sixty-one thousand, one hundred five".