1200211121101 has 2 divisors, whose sum is σ = 1200211121102. Its totient is φ = 1200211121100.

The previous prime is 1200211121071. The next prime is 1200211121189. The reversal of 1200211121101 is 1011211120021.

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., 717010965225 + 483200155876 = 846765^2 + 695126^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200211121101 - 2³¹ = 1198063637453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200211131101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600105560550 + 600105560551.

It is an arithmetic number, because the mean of its divisors is an integer number (600105560551).

Almost surely, 2^{1200211121101} is an apocalyptic number.

It is an amenable number.

1200211121101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200211121101 is an equidigital number, since it uses as much as digits as its factorization.

1200211121101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1200211121101 its reverse (1011211120021), we get a palindrome (2211422241122).

The spelling of 1200211121101 in words is "one trillion, two hundred billion, two hundred eleven million, one hundred twenty-one thousand, one hundred one".