21250225666379 has 2 divisors, whose sum is σ = 21250225666380. Its totient is φ = 21250225666378.

The previous prime is 21250225666367. The next prime is 21250225666391. The reversal of 21250225666379 is 97366652205212.

It is a balanced prime because it is at equal distance from previous prime (21250225666367) and next prime (21250225666391).

It is a cyclic number.

It is not a de Polignac number, because 21250225666379 - 2¹⁶ = 21250225600843 is a prime.

It is a super-2 number, since 2×21250225666379² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21250225656379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10625112833189 + 10625112833190.

It is an arithmetic number, because the mean of its divisors is an integer number (10625112833190).

Almost surely, 2^{21250225666379} is an apocalyptic number.

21250225666379 is a deficient number, since it is larger than the sum of its proper divisors (1).

21250225666379 is an equidigital number, since it uses as much as digits as its factorization.

21250225666379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16329600, while the sum is 56.

The spelling of 21250225666379 in words is "twenty-one trillion, two hundred fifty billion, two hundred twenty-five million, six hundred sixty-six thousand, three hundred seventy-nine".