21160117427 has 2 divisors, whose sum is σ = 21160117428. Its totient is φ = 21160117426.

The previous prime is 21160117387. The next prime is 21160117453. The reversal of 21160117427 is 72471106112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21160117427 - 2¹⁴ = 21160101043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21160117393 and 21160117402.

It is not a weakly prime, because it can be changed into another prime (21160147427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10580058713 + 10580058714.

It is an arithmetic number, because the mean of its divisors is an integer number (10580058714).

Almost surely, 2^21160117427 is an apocalyptic number.

21160117427 is a deficient number, since it is larger than the sum of its proper divisors (1).

21160117427 is an equidigital number, since it uses as much as digits as its factorization.

21160117427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 32.

The spelling of 21160117427 in words is "twenty-one billion, one hundred sixty million, one hundred seventeen thousand, four hundred twenty-seven".