21341412049 has 2 divisors, whose sum is σ = 21341412050. Its totient is φ = 21341412048.

The previous prime is 21341412023. The next prime is 21341412061. The reversal of 21341412049 is 94021414312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21065619600 + 275792449 = 145140^2 + 16607^2 .

It is a cyclic number.

It is not a de Polignac number, because 21341412049 - 2⁷ = 21341411921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21341412049.

It is not a weakly prime, because it can be changed into another prime (21341412089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10670706024 + 10670706025.

It is an arithmetic number, because the mean of its divisors is an integer number (10670706025).

Almost surely, 2^21341412049 is an apocalyptic number.

It is an amenable number.

21341412049 is a deficient number, since it is larger than the sum of its proper divisors (1).

21341412049 is an equidigital number, since it uses as much as digits as its factorization.

21341412049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 21341412049 in words is "twenty-one billion, three hundred forty-one million, four hundred twelve thousand, forty-nine".