1200220209973 has 2 divisors, whose sum is σ = 1200220209974. Its totient is φ = 1200220209972.

The previous prime is 1200220209971. The next prime is 1200220210099. The reversal of 1200220209973 is 3799020220021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 636792828049 + 563427381924 = 797993^2 + 750618^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200220209973 - 2¹ = 1200220209971 is a prime.

Together with 1200220209971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200220209971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600110104986 + 600110104987.

It is an arithmetic number, because the mean of its divisors is an integer number (600110104987).

Almost surely, 2^{1200220209973} is an apocalyptic number.

It is an amenable number.

1200220209973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200220209973 is an equidigital number, since it uses as much as digits as its factorization.

1200220209973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

Adding to 1200220209973 its reverse (3799020220021), we get a palindrome (4999240429994).

The spelling of 1200220209973 in words is "one trillion, two hundred billion, two hundred twenty million, two hundred nine thousand, nine hundred seventy-three".