1201112001977 has 2 divisors, whose sum is σ = 1201112001978. Its totient is φ = 1201112001976.

The previous prime is 1201112001917. The next prime is 1201112002049. The reversal of 1201112001977 is 7791002111021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 951055998841 + 250056003136 = 975221^2 + 500056^2 .

It is an emirp because it is prime and its reverse (7791002111021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1201112001977 - 2²² = 1201107807673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201112001917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600556000988 + 600556000989.

It is an arithmetic number, because the mean of its divisors is an integer number (600556000989).

Almost surely, 2^{1201112001977} is an apocalyptic number.

It is an amenable number.

1201112001977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201112001977 is an equidigital number, since it uses as much as digits as its factorization.

1201112001977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 32.

Adding to 1201112001977 its reverse (7791002111021), we get a palindrome (8992114112998).

The spelling of 1201112001977 in words is "one trillion, two hundred one billion, one hundred twelve million, one thousand, nine hundred seventy-seven".