21114421049 has 2 divisors, whose sum is σ = 21114421050. Its totient is φ = 21114421048.

The previous prime is 21114420991. The next prime is 21114421051. The reversal of 21114421049 is 94012441112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13634765824 + 7479655225 = 116768^2 + 86485^2 .

It is a cyclic number.

It is not a de Polignac number, because 21114421049 - 2¹⁶ = 21114355513 is a prime.

Together with 21114421051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21114421249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557210524 + 10557210525.

It is an arithmetic number, because the mean of its divisors is an integer number (10557210525).

Almost surely, 2^21114421049 is an apocalyptic number.

It is an amenable number.

21114421049 is a deficient number, since it is larger than the sum of its proper divisors (1).

21114421049 is an equidigital number, since it uses as much as digits as its factorization.

21114421049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 21114421049 in words is "twenty-one billion, one hundred fourteen million, four hundred twenty-one thousand, forty-nine".