21250225666367 has 2 divisors, whose sum is σ = 21250225666368. Its totient is φ = 21250225666366.

The previous prime is 21250225666321. The next prime is 21250225666379. The reversal of 21250225666367 is 76366652205212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21250225666367 - 2¹⁶ = 21250225600831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21250225666667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10625112833183 + 10625112833184.

It is an arithmetic number, because the mean of its divisors is an integer number (10625112833184).

Almost surely, 2^{21250225666367} is an apocalyptic number.

21250225666367 is a deficient number, since it is larger than the sum of its proper divisors (1).

21250225666367 is an equidigital number, since it uses as much as digits as its factorization.

21250225666367 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 21250225666367 in words is "twenty-one trillion, two hundred fifty billion, two hundred twenty-five million, six hundred sixty-six thousand, three hundred sixty-seven".