21214378822297 has 2 divisors, whose sum is σ = 21214378822298. Its totient is φ = 21214378822296.

The previous prime is 21214378822253. The next prime is 21214378822321. The reversal of 21214378822297 is 79222887341212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21098781542281 + 115597280016 = 4593341^2 + 339996^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214378822297 - 2¹¹ = 21214378820249 is a prime.

It is not a weakly prime, because it can be changed into another prime (21214378822207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607189411148 + 10607189411149.

It is an arithmetic number, because the mean of its divisors is an integer number (10607189411149).

Almost surely, 2^{21214378822297} is an apocalyptic number.

It is an amenable number.

21214378822297 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214378822297 is an equidigital number, since it uses as much as digits as its factorization.

21214378822297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10838016, while the sum is 58.

The spelling of 21214378822297 in words is "twenty-one trillion, two hundred fourteen billion, three hundred seventy-eight million, eight hundred twenty-two thousand, two hundred ninety-seven".