1201200211121 has 2 divisors, whose sum is σ = 1201200211122. Its totient is φ = 1201200211120.

The previous prime is 1201200211109. The next prime is 1201200211153. The reversal of 1201200211121 is 1211120021021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1185833881600 + 15366329521 = 1088960^2 + 123961^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201200211121 - 2¹⁴ = 1201200194737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201200211096 and 1201200211105.

It is not a weakly prime, because it can be changed into another prime (1201200211171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600600105560 + 600600105561.

It is an arithmetic number, because the mean of its divisors is an integer number (600600105561).

Almost surely, 2^{1201200211121} is an apocalyptic number.

It is an amenable number.

1201200211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201200211121 is an equidigital number, since it uses as much as digits as its factorization.

1201200211121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1201200211121 its reverse (1211120021021), we get a palindrome (2412320232142).

The spelling of 1201200211121 in words is "one trillion, two hundred one billion, two hundred million, two hundred eleven thousand, one hundred twenty-one".