16212560166431 has 2 divisors, whose sum is σ = 16212560166432. Its totient is φ = 16212560166430.

The previous prime is 16212560166401. The next prime is 16212560166437. The reversal of 16212560166431 is 13466106521261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16212560166431 - 2³⁰ = 16211486424607 is a prime.

It is a super-2 number, since 2×16212560166431² (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 (16212560166437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8106280083215 + 8106280083216.

It is an arithmetic number, because the mean of its divisors is an integer number (8106280083216).

Almost surely, 2^{16212560166431} is an apocalyptic number.

16212560166431 is a deficient number, since it is larger than the sum of its proper divisors (1).

16212560166431 is an equidigital number, since it uses as much as digits as its factorization.

16212560166431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

Adding to 16212560166431 its reverse (13466106521261), we get a palindrome (29678666687692).

The spelling of 16212560166431 in words is "sixteen trillion, two hundred twelve billion, five hundred sixty million, one hundred sixty-six thousand, four hundred thirty-one".