21253225264379 has 2 divisors, whose sum is σ = 21253225264380. Its totient is φ = 21253225264378.

The previous prime is 21253225264333. The next prime is 21253225264451. The reversal of 21253225264379 is 97346252235212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21253225264379 - 2¹² = 21253225260283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21253225264379.

It is not a weakly prime, because it can be changed into another prime (21253225264309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10626612632189 + 10626612632190.

It is an arithmetic number, because the mean of its divisors is an integer number (10626612632190).

Almost surely, 2^{21253225264379} is an apocalyptic number.

21253225264379 is a deficient number, since it is larger than the sum of its proper divisors (1).

21253225264379 is an equidigital number, since it uses as much as digits as its factorization.

21253225264379 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 21253225264379 in words is "twenty-one trillion, two hundred fifty-three billion, two hundred twenty-five million, two hundred sixty-four thousand, three hundred seventy-nine".