21133502216069 has 2 divisors, whose sum is σ = 21133502216070. Its totient is φ = 21133502216068.

The previous prime is 21133502216033. The next prime is 21133502216117. The reversal of 21133502216069 is 96061220533112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21128225937025 + 5276279044 = 4596545^2 + 72638^2 .

It is a cyclic number.

It is not a de Polignac number, because 21133502216069 - 2¹⁶ = 21133502150533 is a prime.

It is a super-2 number, since 2×21133502216069² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21133502215069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566751108034 + 10566751108035.

It is an arithmetic number, because the mean of its divisors is an integer number (10566751108035).

Almost surely, 2^{21133502216069} is an apocalyptic number.

It is an amenable number.

21133502216069 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133502216069 is an equidigital number, since it uses as much as digits as its factorization.

21133502216069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 21133502216069 in words is "twenty-one trillion, one hundred thirty-three billion, five hundred two million, two hundred sixteen thousand, sixty-nine".