21506212150063 has 2 divisors, whose sum is σ = 21506212150064. Its totient is φ = 21506212150062.

The previous prime is 21506212150039. The next prime is 21506212150079. The reversal of 21506212150063 is 36005121260512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21506212150063 - 2³³ = 21497622215471 is a prime.

It is a super-2 number, since 2×21506212150063² (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 (21506212250063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10753106075031 + 10753106075032.

It is an arithmetic number, because the mean of its divisors is an integer number (10753106075032).

Almost surely, 2^{21506212150063} is an apocalyptic number.

21506212150063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21506212150063 is an equidigital number, since it uses as much as digits as its factorization.

21506212150063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 21506212150063 in words is "twenty-one trillion, five hundred six billion, two hundred twelve million, one hundred fifty thousand, sixty-three".