212021120249 has 2 divisors, whose sum is σ = 212021120250. Its totient is φ = 212021120248.

The previous prime is 212021120093. The next prime is 212021120263. The reversal of 212021120249 is 942021120212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206479360000 + 5541760249 = 454400^2 + 74443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021120249 is a prime.

It is not a weakly prime, because it can be changed into another prime (212021120449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010560124 + 106010560125.

It is an arithmetic number, because the mean of its divisors is an integer number (106010560125).

Almost surely, 2^212021120249 is an apocalyptic number.

It is an amenable number.

212021120249 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021120249 is an equidigital number, since it uses as much as digits as its factorization.

212021120249 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 26.

The spelling of 212021120249 in words is "two hundred twelve billion, twenty-one million, one hundred twenty thousand, two hundred forty-nine".