21122302049 has 2 divisors, whose sum is σ = 21122302050. Its totient is φ = 21122302048.

The previous prime is 21122301961. The next prime is 21122302099. The reversal of 21122302049 is 94020322112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16324661824 + 4797640225 = 127768^2 + 69265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122302049 is a prime.

It is not a weakly prime, because it can be changed into another prime (21122302099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561151024 + 10561151025.

It is an arithmetic number, because the mean of its divisors is an integer number (10561151025).

Almost surely, 2^21122302049 is an apocalyptic number.

It is an amenable number.

21122302049 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122302049 is an equidigital number, since it uses as much as digits as its factorization.

21122302049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 21122302049 in words is "twenty-one billion, one hundred twenty-two million, three hundred two thousand, forty-nine".