21133502216107 has 4 divisors (see below), whose sum is σ = 21275337801600. Its totient is φ = 20991666630616.

The previous prime is 21133502216069. The next prime is 21133502216117. The reversal of 21133502216107 is 70161220533112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21133502216107 - 2²³ = 21133493827499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21133502216117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70917792523 + ... + 70917792820.

It is an arithmetic number, because the mean of its divisors is an integer number (5318834450400).

Almost surely, 2^{21133502216107} is an apocalyptic number.

21133502216107 is a deficient number, since it is larger than the sum of its proper divisors (141835585493).

21133502216107 is a wasteful number, since it uses less digits than its factorization.

21133502216107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141835585492.

The product of its (nonzero) digits is 15120, while the sum is 34.

Adding to 21133502216107 its reverse (70161220533112), we get a palindrome (91294722749219).

The spelling of 21133502216107 in words is "twenty-one trillion, one hundred thirty-three billion, five hundred two million, two hundred sixteen thousand, one hundred seven".