21160166371 has 2 divisors, whose sum is σ = 21160166372. Its totient is φ = 21160166370.

The previous prime is 21160166263. The next prime is 21160166387. The reversal of 21160166371 is 17366106112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21160166371 - 2¹¹ = 21160164323 is a prime.

It is not a weakly prime, because it can be changed into another prime (21160166971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10580083185 + 10580083186.

It is an arithmetic number, because the mean of its divisors is an integer number (10580083186).

Almost surely, 2^21160166371 is an apocalyptic number.

21160166371 is a deficient number, since it is larger than the sum of its proper divisors (1).

21160166371 is an equidigital number, since it uses as much as digits as its factorization.

21160166371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 21160166371 in words is "twenty-one billion, one hundred sixty million, one hundred sixty-six thousand, three hundred seventy-one".