21162115327 has 2 divisors, whose sum is σ = 21162115328. Its totient is φ = 21162115326.

The previous prime is 21162115307. The next prime is 21162115369. The reversal of 21162115327 is 72351126112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21162115327 - 2¹⁵ = 21162082559 is a prime.

It is a super-2 number, since 2×21162115327² (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 (21162115307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10581057663 + 10581057664.

It is an arithmetic number, because the mean of its divisors is an integer number (10581057664).

Almost surely, 2^21162115327 is an apocalyptic number.

21162115327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21162115327 is an equidigital number, since it uses as much as digits as its factorization.

21162115327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The spelling of 21162115327 in words is "twenty-one billion, one hundred sixty-two million, one hundred fifteen thousand, three hundred twenty-seven".