21966032203231 has 2 divisors, whose sum is σ = 21966032203232. Its totient is φ = 21966032203230.

The previous prime is 21966032203169. The next prime is 21966032203267. The reversal of 21966032203231 is 13230223066912.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21966032203231 is a prime.

It is a super-2 number, since 2×21966032203231² (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 (21966032203631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10983016101615 + 10983016101616.

It is an arithmetic number, because the mean of its divisors is an integer number (10983016101616).

Almost surely, 2^{21966032203231} is an apocalyptic number.

21966032203231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21966032203231 is an equidigital number, since it uses as much as digits as its factorization.

21966032203231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 40.

The spelling of 21966032203231 in words is "twenty-one trillion, nine hundred sixty-six billion, thirty-two million, two hundred three thousand, two hundred thirty-one".