21250432106441 has 2 divisors, whose sum is σ = 21250432106442. Its totient is φ = 21250432106440.

The previous prime is 21250432106377. The next prime is 21250432106461. The reversal of 21250432106441 is 14460123405212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15888961321216 + 5361470785225 = 3986096^2 + 2315485^2 .

It is a cyclic number.

It is not a de Polignac number, because 21250432106441 - 2⁶ = 21250432106377 is a prime.

It is not a weakly prime, because it can be changed into another prime (21250432106461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10625216053220 + 10625216053221.

It is an arithmetic number, because the mean of its divisors is an integer number (10625216053221).

Almost surely, 2^{21250432106441} is an apocalyptic number.

It is an amenable number.

21250432106441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21250432106441 is an equidigital number, since it uses as much as digits as its factorization.

21250432106441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 21250432106441 in words is "twenty-one trillion, two hundred fifty billion, four hundred thirty-two million, one hundred six thousand, four hundred forty-one".