212005281973 has 2 divisors, whose sum is σ = 212005281974. Its totient is φ = 212005281972.

The previous prime is 212005281941. The next prime is 212005281991. The reversal of 212005281973 is 379182500212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133785498289 + 78219783684 = 365767^2 + 279678^2 .

It is a cyclic number.

It is not a de Polignac number, because 212005281973 - 2⁵ = 212005281941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212005281373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106002640986 + 106002640987.

It is an arithmetic number, because the mean of its divisors is an integer number (106002640987).

Almost surely, 2^212005281973 is an apocalyptic number.

It is an amenable number.

212005281973 is a deficient number, since it is larger than the sum of its proper divisors (1).

212005281973 is an equidigital number, since it uses as much as digits as its factorization.

212005281973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 212005281973 in words is "two hundred twelve billion, five million, two hundred eighty-one thousand, nine hundred seventy-three".