1201221011057 has 2 divisors, whose sum is σ = 1201221011058. Its totient is φ = 1201221011056.

The previous prime is 1201221010993. The next prime is 1201221011071. The reversal of 1201221011057 is 7501101221021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1108491016801 + 92729994256 = 1052849^2 + 304516^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201221011057 - 2⁶ = 1201221010993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201221016057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600610505528 + 600610505529.

It is an arithmetic number, because the mean of its divisors is an integer number (600610505529).

Almost surely, 2^{1201221011057} is an apocalyptic number.

It is an amenable number.

1201221011057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201221011057 is an equidigital number, since it uses as much as digits as its factorization.

1201221011057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 1201221011057 its reverse (7501101221021), we get a palindrome (8702322232078).

The spelling of 1201221011057 in words is "one trillion, two hundred one billion, two hundred twenty-one million, eleven thousand, fifty-seven".