212019964447 has 2 divisors, whose sum is σ = 212019964448. Its totient is φ = 212019964446.

The previous prime is 212019964391. The next prime is 212019964451. The reversal of 212019964447 is 744469910212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212019964447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212019964447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212019964147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106009982223 + 106009982224.

It is an arithmetic number, because the mean of its divisors is an integer number (106009982224).

Almost surely, 2^212019964447 is an apocalyptic number.

212019964447 is a deficient number, since it is larger than the sum of its proper divisors (1).

212019964447 is an equidigital number, since it uses as much as digits as its factorization.

212019964447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 212019964447 in words is "two hundred twelve billion, nineteen million, nine hundred sixty-four thousand, four hundred forty-seven".