10211221111249 has 2 divisors, whose sum is σ = 10211221111250. Its totient is φ = 10211221111248.

The previous prime is 10211221111193. The next prime is 10211221111313. The reversal of 10211221111249 is 94211112211201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7305900861249 + 2905320250000 = 2702943^2 + 1704500^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211221111249 - 2⁹ = 10211221110737 is a prime.

It is not a weakly prime, because it can be changed into another prime (10211221111849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105610555624 + 5105610555625.

It is an arithmetic number, because the mean of its divisors is an integer number (5105610555625).

Almost surely, 2^{10211221111249} is an apocalyptic number.

It is an amenable number.

10211221111249 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211221111249 is an equidigital number, since it uses as much as digits as its factorization.

10211221111249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 10211221111249 in words is "ten trillion, two hundred eleven billion, two hundred twenty-one million, one hundred eleven thousand, two hundred forty-nine".