212031220249 has 2 divisors, whose sum is σ = 212031220250. Its totient is φ = 212031220248.

The previous prime is 212031220243. The next prime is 212031220259. The reversal of 212031220249 is 942022130212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130844975625 + 81186244624 = 361725^2 + 284932^2 .

It is a cyclic number.

It is not a de Polignac number, because 212031220249 - 2³ = 212031220241 is a prime.

It is not a weakly prime, because it can be changed into another prime (212031220241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106015610124 + 106015610125.

It is an arithmetic number, because the mean of its divisors is an integer number (106015610125).

Almost surely, 2^212031220249 is an apocalyptic number.

It is an amenable number.

212031220249 is a deficient number, since it is larger than the sum of its proper divisors (1).

212031220249 is an equidigital number, since it uses as much as digits as its factorization.

212031220249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 212031220249 in words is "two hundred twelve billion, thirty-one million, two hundred twenty thousand, two hundred forty-nine".