10211221049 has 2 divisors, whose sum is σ = 10211221050. Its totient is φ = 10211221048.

The previous prime is 10211220953. The next prime is 10211221057. The reversal of 10211221049 is 94012211201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5736547600 + 4474673449 = 75740^2 + 66893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10211221049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10211221549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105610524 + 5105610525.

It is an arithmetic number, because the mean of its divisors is an integer number (5105610525).

Almost surely, 2^10211221049 is an apocalyptic number.

It is an amenable number.

10211221049 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211221049 is an equidigital number, since it uses as much as digits as its factorization.

10211221049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 10211221049 in words is "ten billion, two hundred eleven million, two hundred twenty-one thousand, forty-nine".