1211420204273 has 2 divisors, whose sum is σ = 1211420204274. Its totient is φ = 1211420204272.

The previous prime is 1211420204263. The next prime is 1211420204279. The reversal of 1211420204273 is 3724020241121.

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., 665671596769 + 545748607504 = 815887^2 + 738748^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211420204273 - 2¹⁰ = 1211420203249 is a prime.

It is a super-3 number, since 3×1211420204273³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1211420204279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605710102136 + 605710102137.

It is an arithmetic number, because the mean of its divisors is an integer number (605710102137).

Almost surely, 2^{1211420204273} is an apocalyptic number.

It is an amenable number.

1211420204273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211420204273 is an equidigital number, since it uses as much as digits as its factorization.

1211420204273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 29.

Adding to 1211420204273 its reverse (3724020241121), we get a palindrome (4935440445394).

The spelling of 1211420204273 in words is "one trillion, two hundred eleven billion, four hundred twenty million, two hundred four thousand, two hundred seventy-three".