21401331227 has 2 divisors, whose sum is σ = 21401331228. Its totient is φ = 21401331226.

The previous prime is 21401331221. The next prime is 21401331239. The reversal of 21401331227 is 72213310412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21401331227 - 2²⁶ = 21334222363 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21401331196 and 21401331205.

It is not a weakly prime, because it can be changed into another prime (21401331221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700665613 + 10700665614.

It is an arithmetic number, because the mean of its divisors is an integer number (10700665614).

Almost surely, 2^21401331227 is an apocalyptic number.

21401331227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21401331227 is an equidigital number, since it uses as much as digits as its factorization.

21401331227 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21401331227 its reverse (72213310412), we get a palindrome (93614641639).

The spelling of 21401331227 in words is "twenty-one billion, four hundred one million, three hundred thirty-one thousand, two hundred twenty-seven".