2012221973 has 2 divisors, whose sum is σ = 2012221974.
Its totient is φ = 2012221972.
The previous prime is 2012221957. The next prime is 2012222027. The reversal of 2012221973 is 3791222102.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1335025444 + 677196529 = 36538^2 + 26023^2
It is a cyclic number.
It is not a de Polignac number, because 2012221973 - 24 = 2012221957 is a prime.
It is a Sophie Germain prime.
It is a Curzon number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2012221943) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006110986 + 1006110987.
It is an arithmetic number, because the mean of its divisors is an integer number (1006110987).
Almost surely, 22012221973 is an apocalyptic number.
It is an amenable number.
2012221973 is a deficient number, since it is larger than the sum of its proper divisors (1).
2012221973 is an equidigital number, since it uses as much as digits as its factorization.
2012221973 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 3024, while the sum is 29.
The square root of 2012221973 is about 44857.7972374926.
The cubic root of 2012221973 is about 1262.4822932262.
The spelling of 2012221973 in words is "two billion, twelve million, two hundred twenty-one thousand, nine hundred seventy-three".