21110231327 has 2 divisors, whose sum is σ = 21110231328. Its totient is φ = 21110231326.

The previous prime is 21110231309. The next prime is 21110231353. The reversal of 21110231327 is 72313201112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21110231327 - 2⁸ = 21110231071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110231027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555115663 + 10555115664.

It is an arithmetic number, because the mean of its divisors is an integer number (10555115664).

Almost surely, 2^21110231327 is an apocalyptic number.

21110231327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110231327 is an equidigital number, since it uses as much as digits as its factorization.

21110231327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 21110231327 its reverse (72313201112), we get a palindrome (93423432439).

The spelling of 21110231327 in words is "twenty-one billion, one hundred ten million, two hundred thirty-one thousand, three hundred twenty-seven".