21250614211 has 2 divisors, whose sum is σ = 21250614212. Its totient is φ = 21250614210.

The previous prime is 21250614157. The next prime is 21250614257. The reversal of 21250614211 is 11241605212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21250614211 - 2⁷ = 21250614083 is a prime.

It is not a weakly prime, because it can be changed into another prime (21250614811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10625307105 + 10625307106.

It is an arithmetic number, because the mean of its divisors is an integer number (10625307106).

Almost surely, 2^21250614211 is an apocalyptic number.

21250614211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21250614211 is an equidigital number, since it uses as much as digits as its factorization.

21250614211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The spelling of 21250614211 in words is "twenty-one billion, two hundred fifty million, six hundred fourteen thousand, two hundred eleven".