21114342247 has 2 divisors, whose sum is σ = 21114342248. Its totient is φ = 21114342246.

The previous prime is 21114342239. The next prime is 21114342257. The reversal of 21114342247 is 74224341112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21114342247 - 2³ = 21114342239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21114342257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557171123 + 10557171124.

It is an arithmetic number, because the mean of its divisors is an integer number (10557171124).

Almost surely, 2^21114342247 is an apocalyptic number.

21114342247 is a deficient number, since it is larger than the sum of its proper divisors (1).

21114342247 is an equidigital number, since it uses as much as digits as its factorization.

21114342247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 31.

Adding to 21114342247 its reverse (74224341112), we get a palindrome (95338683359).

The spelling of 21114342247 in words is "twenty-one billion, one hundred fourteen million, three hundred forty-two thousand, two hundred forty-seven".