1211201111273 has 2 divisors, whose sum is σ = 1211201111274. Its totient is φ = 1211201111272.

The previous prime is 1211201111261. The next prime is 1211201111291. The reversal of 1211201111273 is 3721111021121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 913578490969 + 297622620304 = 955813^2 + 545548^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211201111273 - 2⁴ = 1211201111257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211201111243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605600555636 + 605600555637.

It is an arithmetic number, because the mean of its divisors is an integer number (605600555637).

Almost surely, 2^{1211201111273} is an apocalyptic number.

It is an amenable number.

1211201111273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211201111273 is an equidigital number, since it uses as much as digits as its factorization.

1211201111273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 23.

Adding to 1211201111273 its reverse (3721111021121), we get a palindrome (4932312132394).

The spelling of 1211201111273 in words is "one trillion, two hundred eleven billion, two hundred one million, one hundred eleven thousand, two hundred seventy-three".