21214378822207 has 2 divisors, whose sum is σ = 21214378822208. Its totient is φ = 21214378822206.

The previous prime is 21214378822163. The next prime is 21214378822223. The reversal of 21214378822207 is 70222887341212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21214378822207 - 2¹⁹ = 21214378297919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214378822297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607189411103 + 10607189411104.

It is an arithmetic number, because the mean of its divisors is an integer number (10607189411104).

Almost surely, 2^{21214378822207} is an apocalyptic number.

21214378822207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214378822207 is an equidigital number, since it uses as much as digits as its factorization.

21214378822207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1204224, while the sum is 49.

The spelling of 21214378822207 in words is "twenty-one trillion, two hundred fourteen billion, three hundred seventy-eight million, eight hundred twenty-two thousand, two hundred seven".