1211887984253 has 2 divisors, whose sum is σ = 1211887984254. Its totient is φ = 1211887984252.

The previous prime is 1211887984243. The next prime is 1211887984301. The reversal of 1211887984253 is 3524897881121.

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., 1102590301849 + 109297682404 = 1050043^2 + 330602^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211887984253 - 2²⁴ = 1211871207037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211887984192 and 1211887984201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211887984213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605943992126 + 605943992127.

It is an arithmetic number, because the mean of its divisors is an integer number (605943992127).

Almost surely, 2^{1211887984253} is an apocalyptic number.

It is an amenable number.

1211887984253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211887984253 is an equidigital number, since it uses as much as digits as its factorization.

1211887984253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 59.

The spelling of 1211887984253 in words is "one trillion, two hundred eleven billion, eight hundred eighty-seven million, nine hundred eighty-four thousand, two hundred fifty-three".