21331130167 has 2 divisors, whose sum is σ = 21331130168. Its totient is φ = 21331130166.

The previous prime is 21331130123. The next prime is 21331130207. The reversal of 21331130167 is 76103113312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21331130167 is a prime.

It is a super-2 number, since 2×21331130167² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21331130867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665565083 + 10665565084.

It is an arithmetic number, because the mean of its divisors is an integer number (10665565084).

Almost surely, 2^21331130167 is an apocalyptic number.

21331130167 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331130167 is an equidigital number, since it uses as much as digits as its factorization.

21331130167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

Adding to 21331130167 its reverse (76103113312), we get a palindrome (97434243479).

The spelling of 21331130167 in words is "twenty-one billion, three hundred thirty-one million, one hundred thirty thousand, one hundred sixty-seven".