21246189227 has 2 divisors, whose sum is σ = 21246189228. Its totient is φ = 21246189226.

The previous prime is 21246189121. The next prime is 21246189259. The reversal of 21246189227 is 72298164212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21246189227 - 2¹² = 21246185131 is a prime.

It is not a weakly prime, because it can be changed into another prime (21246189527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10623094613 + 10623094614.

It is an arithmetic number, because the mean of its divisors is an integer number (10623094614).

Almost surely, 2^21246189227 is an apocalyptic number.

21246189227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21246189227 is an equidigital number, since it uses as much as digits as its factorization.

21246189227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The spelling of 21246189227 in words is "twenty-one billion, two hundred forty-six million, one hundred eighty-nine thousand, two hundred twenty-seven".