1201210221977 has 2 divisors, whose sum is σ = 1201210221978. Its totient is φ = 1201210221976.

The previous prime is 1201210221971. The next prime is 1201210222057. The reversal of 1201210221977 is 7791220121021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1059549070336 + 141661151641 = 1029344^2 + 376379^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201210221977 - 2²⁰ = 1201209173401 is a prime.

It is a super-2 number, since 2×1201210221977² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1201210221971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600605110988 + 600605110989.

It is an arithmetic number, because the mean of its divisors is an integer number (600605110989).

Almost surely, 2^{1201210221977} is an apocalyptic number.

It is an amenable number.

1201210221977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201210221977 is an equidigital number, since it uses as much as digits as its factorization.

1201210221977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 35.

Adding to 1201210221977 its reverse (7791220121021), we get a palindrome (8992430342998).

The spelling of 1201210221977 in words is "one trillion, two hundred one billion, two hundred ten million, two hundred twenty-one thousand, nine hundred seventy-seven".