21221132327 has 2 divisors, whose sum is σ = 21221132328. Its totient is φ = 21221132326.

The previous prime is 21221132323. The next prime is 21221132369. The reversal of 21221132327 is 72323112212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21221132327 - 2² = 21221132323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21221132296 and 21221132305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221132323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610566163 + 10610566164.

It is an arithmetic number, because the mean of its divisors is an integer number (10610566164).

Almost surely, 2^21221132327 is an apocalyptic number.

21221132327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221132327 is an equidigital number, since it uses as much as digits as its factorization.

21221132327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

Adding to 21221132327 its reverse (72323112212), we get a palindrome (93544244539).

The spelling of 21221132327 in words is "twenty-one billion, two hundred twenty-one million, one hundred thirty-two thousand, three hundred twenty-seven".