211220220049 has 2 divisors, whose sum is σ = 211220220050. Its totient is φ = 211220220048.

The previous prime is 211220220023. The next prime is 211220220121. The reversal of 211220220049 is 940022022112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147409923600 + 63810296449 = 383940^2 + 252607^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211220220049 is a prime.

It is a super-2 number, since 2×211220220049² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211220220749) 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, 105610110024 + 105610110025.

It is an arithmetic number, because the mean of its divisors is an integer number (105610110025).

Almost surely, 2^211220220049 is an apocalyptic number.

It is an amenable number.

211220220049 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220220049 is an equidigital number, since it uses as much as digits as its factorization.

211220220049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 211220220049 in words is "two hundred eleven billion, two hundred twenty million, two hundred twenty thousand, forty-nine".