1211053553343 has 8 divisors (see below), whose sum is σ = 1794153412400. Its totient is φ = 807369035544.

The previous prime is 1211053553317. The next prime is 1211053553351. The reversal of 1211053553343 is 3433553501121.

1211053553343 is a `hidden beast` number, since 1 + 2 + 1 + 10 + 53 + 553 + 3 + 43 = 666.

It is not a de Polignac number, because 1211053553343 - 2¹³ = 1211053545151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211053553298 and 1211053553307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211053553443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22426917628 + ... + 22426917681.

It is an arithmetic number, because the mean of its divisors is an integer number (224269176550).

Almost surely, 2^{1211053553343} is an apocalyptic number.

1211053553343 is a deficient number, since it is larger than the sum of its proper divisors (583099859057).

1211053553343 is an equidigital number, since it uses as much as digits as its factorization.

1211053553343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44853835318 (or 44853835312 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The spelling of 1211053553343 in words is "one trillion, two hundred eleven billion, fifty-three million, five hundred fifty-three thousand, three hundred forty-three".