1211210011201 has 2 divisors, whose sum is σ = 1211210011202. Its totient is φ = 1211210011200.

The previous prime is 1211210011169. The next prime is 1211210011267. The reversal of 1211210011201 is 1021100121121.

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., 1126368303025 + 84841708176 = 1061305^2 + 291276^2 .

It is an emirp because it is prime and its reverse (1021100121121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211210011201 - 2⁵ = 1211210011169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211210111201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605605005600 + 605605005601.

It is an arithmetic number, because the mean of its divisors is an integer number (605605005601).

Almost surely, 2^{1211210011201} is an apocalyptic number.

It is an amenable number.

1211210011201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211210011201 is an equidigital number, since it uses as much as digits as its factorization.

1211210011201 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1211210011201 its reverse (1021100121121), we get a palindrome (2232310132322).

The spelling of 1211210011201 in words is "one trillion, two hundred eleven billion, two hundred ten million, eleven thousand, two hundred one".